U.S. patent number 3,725,561 [Application Number 05/180,424] was granted by the patent office on 1973-04-03 for method of electrically reproducing music and improved electrical pickup for practicing the same.
This patent grant is currently assigned to Gibson, Inc.. Invention is credited to Les Paul.
United States Patent |
3,725,561 |
Paul |
April 3, 1973 |
METHOD OF ELECTRICALLY REPRODUCING MUSIC AND IMPROVED ELECTRICAL
PICKUP FOR PRACTICING THE SAME
Abstract
Improvements in the electrical reproduction of the audio output
of musical instruments having vibrating surfaces reproducing said
audio output, illustrative examples of which are a drum and a
guitar. Product aspects of the invention are demonstrated by the
use of an improved electrical pickup that is mounted for vibration
in unison with the vibrating surface and thus provides a vibrating
magnetic field. A field-influencing magnetic body is confined
within a compartment of the electrical pickup that is bounded by
resilient walls that in practice causes said body to be set into
vibration along with the pickup but in an out-of-phase vibratory
pattern. The effect of the vibrating magnetic body is to provide a
signal-producing movement relative to the magnetic field that
effectively results in audio output reproduction.
Inventors: |
Paul; Les (Mahwah, NJ) |
Assignee: |
Gibson, Inc. (Kalamazoo,
MI)
|
Family
ID: |
22660411 |
Appl.
No.: |
05/180,424 |
Filed: |
September 14, 1971 |
Related U.S. Patent Documents
|
|
|
|
|
|
|
Application
Number |
Filing Date |
Patent Number |
Issue Date |
|
|
77946 |
Oct 6, 1970 |
|
|
|
|
Current U.S.
Class: |
84/726;
84/DIG.12; 381/118; 984/365; 84/411R |
Current CPC
Class: |
G10H
3/146 (20130101); G10H 2230/321 (20130101); G10H
2230/275 (20130101); Y10S 84/12 (20130101) |
Current International
Class: |
G10H
3/00 (20060101); G10H 3/14 (20060101); G10h
003/08 () |
Field of
Search: |
;84/1.01,1.04,1.14-1.16,DIG.12 |
References Cited
[Referenced By]
U.S. Patent Documents
Primary Examiner: Wilkinson; Richard B.
Assistant Examiner: Witkowski; Stanley J.
Parent Case Text
This is a continuation-in-part of application Ser. No. 77,946,
filed Oct. 6, 1970 now abandoned.
Claims
What is claimed is:
1. An improved electrical pickup for a musical instrument having a
vibrating body producing the musical tones thereof comprising an
electrical pickup having means producing a magnetic field and at
least one coil in electrical signal-producing relation to said
magnetic field, a resilient body having internal walls bounding an
internal volume of a predetermined extent, means mounting both said
electrical pickup and said resilient body for movement in unison
with said vibrating body, and a magnetic means disposed within said
internal volume of a smaller extent than said internal volume and
free of any connection with any of said internal walls bounding
said internal volume so as to have a vibratory pattern which
differs from that of said electrical pickup and thereby being
electrically effective to cause shifting in said magnetic field due
to the relative vibrations between said magnetic means and said
electrical pickup, whereby said shifting magnetic field produces
electrical signals in said coil related to said vibration of said
vibrating body of said instrument.
2. An improved electrical pickup for a stringed musical instrument
having vibrating strings producing the musical tones thereof
comprising an electrical pickup having means producing a magnetic
field and at least one coil in electrical signal-producing relation
to said magnetic field, a resilient body having internal walls
bounding an internal volume of a predetermined extent, a bridge in
supporting relation to and adapted to be vibrated by said vibrating
strings of said stringed instrument, means mounting both said
electrical pickup and said resilient body in depending relation
from said bridge for movement in unison therewith, and a magnetic
means disposed within said internal volume of a smaller extent than
said internal volume and free of any connection with any of said
internal walls bounding said internal volume so as to have a
vibratory pattern which differs from that of said electrical pickup
and thereby being electrically effective to cause shifting in said
magnetic field due to the relative vibration between said magnetic
means and said electrical pickup, whereby said shifting magnetic
field produces electrical signals in said coil related to said
vibration of said vibrating strings of said instrument.
3. An improved electrical pickup for a musical instrument having a
vibrating body producing the musical tones thereof comprising an
electrical pickup having means producing a magnetic field and at
least one coil in electrical signal-producing relation to said
magnetic field, a resilient body having internal walls bounding an
internal volume of a predetermined extent, means mounting both said
electrical pickup and said resilient body for movement in unison
with said vibrating body, a first magnetic means having an
interposed position between said electrical pickup and said
vibrating body electrically effective to cause shifting in said
magnetic field of said electrical pickup, and a second magnetic
means disposed within said internal volume of a smaller extent than
said internal volume and free of any connection with any of said
internal walls bounding said internal volume so as to have a
vibratory pattern which differs from that of said electrical pickup
and thereby being electrically effective to cause shifting in said
magnetic field due to the relative vibration between said magnetic
body and said electrical pickup, whereby the aforesaid two shifting
magnetic fields caused by said first and second magnetic means
produce electrical signals in said coil related to said vibration
of said vibrating body of said instrument.
Description
The present invention relates generally to improvements in the
electrical reproduction of music, and more particularly to an
improved electrical pickup, characterized by selective reproduction
of the low and high frequency content of an audio output, which may
be used with noteworthy results on a wide range of musical
instruments that have a sound-producing vibrating surface. For
purposes of illustration only, and not limitation, the pickup
hereof is described in connection with a drum and a guitar.
More particularly, the preparation of the aforesaid instruments,
and particularly a drum, for electrical sound reproduction has
heretofore been very difficult to achieve. Among other reasons is
the requirement that for the proper functioning of a conventional
electrical pickup at least one of the signal-producing components
thereof remain stationary while the others vibrate so that the
resultant relative movement therebetween can be utilized to produce
electrical signals that are used, in a well understood manner, to
in turn produce sound. Specifically, the aforesaid stationary
mounting complicates, both in set-up time and equipment, the proper
application of the pickup to the drum, and to a lesser extent to
the guitar.
Moreover, the vibration experienced during a normal playing
interval of a drum, as contrasted with a non-percussion musical
instrument, further complicates the problem.
Still further, the full range of the drum audio output, exemplified
by high frequency brush stroke sounds on the one hand and booming
sounds produced by beating the drumhead on the other hand, has been
difficult to faithfully reproduce by any known electrical pickup
even when properly installed on the drum. It is similarly difficult
to faithfully reproduce the full range of musical tones of a guitar
or like stringed musical instrument.
Broadly, it is an object of the present invention to provide an
improved electrical pickup, distinct in its mode of operation as
well as construction, overcoming the foregoing and other
shortcomings of the prior art. Specifically, among other noteworthy
aspects, the entire pickup hereof is mounted on the instrument
vibrating surface, such as the drumhead or guitar body, and
functions properly merely upon being set into vibration by this
surface, thereby obviating the need for mounting or holding any of
the components in stationary relation to said instrument vibrating
surface.
An improved pickup demonstrating product aspects of the present
invention includes a conventional electrical pickup and, when
applied to a drum or like percussion instrument, also includes
appropriate mounting means for applying said pickup and an
interposed field-influencing body under firm pressure against the
drumhead or vibrating surface, with the result that sound
reproduction is confined to the high frequency portion of the audio
output, such as the brush strokes. Adjacent the remote side of the
pickup there is provided a confined, but nevertheless freely
vibrating additional field-influencing body which is set into
vibration by the vibration of the electrical pickup. However, the
patterns of vibration of this body and of the pickup differ so that
there is the requisite signal-producing relative movement
therebetween, this time confined to parameters which are related to
the low frequency portion of the drum audio output, such that
corresponding drum sounds are readily produced therefrom. In this
way, the pickup hereof is constructed and functions to faithfully
reproduce the full range of the musical instrument to which it is
applied, and furthermore does so with an exclusion of extraneous
sounds since such sounds are not produced by the instrument's
vibrating surface.
The aforesaid pickup and mounting is also used and applied,
substantially as just described, for stringed and like instruments,
except that in some instances the interposed field-influencing body
which causes reproduction of the high frequency musical tones is
dispensed with. In such instances, metallic strings of the
instrument are situated within the pickup magnetic field and thus,
when set into vibration, directly result in the reproduction of the
high frequency musical tones.
The above brief descriptions, as well as further objects, features
and advantages of the present invention, will be more fully
appreciated by reference to the following detailed description of
presently preferred, but nonetheless illustrative embodiments in
accordance with the present invention, when taken in conjunction
with the accompanying drawings, wherein:
FIG. 1 illustrates the method of producing the musical tones of a
drum in accordance with the method of the present invention and
contains a perspective view of such instrument having an improved
electrical pickup practicing the method hereof applied thereto;
FIG. 2 is a partial elevational view, on an enlarged scale,
illustrating structural details of the pickup. Moreover, since the
illustrative embodiment is generally cylindrical or circular in
shape, including both the external and internal parts thereof, plan
views illustrating such shape have been omitted as being
unnecessary;
FIGS. 3, 4a, 4b and 5 illustrate application of the pickup hereof
to a guitar, FIG. 3 being a perspective view showing several ways
of mounting such pickup to this exemplary stringed instrument;
FIG. 4a is a side elevational view, on an enlarged scale and in
section taken on line 4--4 of FIG. 3, illustrating a mounting most
similar to that of the drum of FIGS. 1 and 2 in that it includes
use of an interposed field-influencing body to reproduce the high
frequency tones of the strings;
FIG. 4b is a view similar to FIG. 4a, except that another type of
mounting is illustrated therein; and
FIG. 5 is also a side elevational view, but taken in section on
line 5--5 of FIG. 3, and illustrates still another pickup mounting
in which the vibrating metallic strings of the instrument directly
result in the reproduction of the high frequency tones thereof.
DRUM PICKUP
Reference is now made to the drawings and particularly FIGS. 1 and
2, wherein there is shown an improved electrical pickup, generally
designated 10, demonstrating both product and method aspects of the
present invention. Specifically, pickup 10 includes as a part
thereof a conventional electrical pickup, generally designated 12,
conventionally constructed to the extent that it includes north and
south pole pieces 14, 16, respectively, which, as generally
understood, are effective in producing a magnetic field. As an
alternative to the permanent magnets 14, 16, use can, of course,
also be made of electromagnets (not shown) since for purposes of
the invention all that is necessary is the production of a magnetic
field. As is further generally understood, the conventional
electrical pickup 12 also includes an electrical conductor which is
wound into a coil 18 in an orientation relative to the magnetic
field of the pole pieces 14, 16 such that any shifting in this
field cuts the coil 18 so that, in a well understood manner, an
electrical signal is produced in the coil 18. As further generally
understood, the conductor from which the coil 18 is made includes
leads 20 and 22 which will be understood to be electrically
connected to an amplifier, speakers, and other such sound
reproducing equipment as is necessary to convert the transmitted
electrical signals into musical tones which, of course, are related
to those musical tones of the musical instrument to which the
pickup 10 is applied.
In the illustrated embodiment, the percussion musical instrument 24
in question is one type of drum, but it will be understood that the
invention is not limited to use therewith but can be used also with
other types of drums, cymbals, and generally with any percussion
instrument which has a vibrating surface which produces the musical
tones or sounds of the musical instrument. At this point, it should
furthermore be noted that the conventional electrical pickup 12
need not be limited to the construction described but that changes
may be made thereto such as, for example, the single coil 18 may in
fact consist of two coils electrically connected in opposing or
so-called humbucked relation.
Thus far, what has been described is conventional and merely forms
the background for the invention, the significant aspects of which
will now be described. Specifically, and in accordance with the
present invention, the improved electrical pickup 10 hereof is
mounted directly to the drum 24 such that it is set into vibration
during the playing of this instrument when the vibrating surface,
in this instance the drum head 26, is set into vibration. To
achieve this objective, there is provided an L-shaped mounting
bracket 28, the vertically oriented leg 30 of which is
appropriately secured, as by welding, to a mounting plate 32 which,
in turn, is screwed or otherwise connected, as at 34, to the upper
drum rim 36. The other horizontally oriented leg 38 is thus
advantageously projected in a clearance position above a peripheral
area of the drum head 26, the significance of which clearance
position will become obvious as the description proceeds.
At this point, it is convenient to note the manner in which the
conventional electrical pickup 12 is embodied in the improved
pickup 10. In the illustrated embodiment, the improved pickup 10 is
provided with a generally cylindrical cup-shaped external body 40,
the side wall 42 of which is of an appropriate size to accommodate
the electrical pickup 12 at one end thereof with the closing end
wall 44 thereof spaced from the top surface 46 of pickup 12 so as
to define an internal compartment 48 between wall 44 and surface
46.
Disposed within compartment 48 is a cylindrical puff-shaped body 50
formed of a porous elastomeric material which may be a conventional
sponge or the like. Specifically body 50 is formed in two halves 52
and 54 which may be adhesively secured together at their periphery,
as at 56. Prior to this adhesive connection, however, the medial
portions of the body halves 52 and 54 have facing portions thereof
removed so that when they are combined the remaining walls
cooperate to bound an internal compartment 58. Disposed in the
compartment 58 is a generally circular magnetic body 60 fabricated
or iron or other such metal which is capable of being magnetized
and thus of affecting any magnetic field in which it is placed. In
this regard, the medial portion 62 of the body half 54 which, as
illustrated, occupies an interposed position between the pickup 12
and the metal body 60 is of a sufficient extent to prevent the
magnetic capture of the body 60 by the pole pieces 14 and 16. On
the other hand, the separation represented by the medial portion 62
is not that extensive as to remove the body 60 from the magnetic
field produced by the pole pieces 14, 16, and in fact it is to be
understood that the adjacent location of the body 60 and the pickup
12 is such that the body 60 is within the magnetic field of the
pickup 12.
Also electrically cooperating with the conventional electrical
pickup portion 12 of the improved pickup 10, but on the side remote
from the body 60, is another magnetic body 64. As illustrated, the
magnetic body 64 is electrically insulated by a thin layer 66 of
felt, paper or the like from direct contact with the pole pieces 14
and 16 and further occupies a critical interposed position between
the electrical pickup 12 and the vibrating surface 26. As generally
understood, if a magnetic body, such as the bodies 60 or 64 are
moved relative to the electrical pickup 12 within the magnetic
field thereof, or if the pickup 12 is moved relative to either of
these magnetic bodies, in either case the magnetic bodies are known
to have that effect on the magnetic field of the electrical pickup
which causes a shifting in the lines of force thereof. This
shifting, in turn, cuts the coil 18 and is similarly known to
produce electrical signals therein which, after being transmitted
through the conductors 20 and 22 to amplifiers and other
sound-reproducing equipment, can be used, or at least it has been
so found, to faithfully produce the audio output or sounds of the
drum 44.
In the above connection, an important aspect and contribution of
the present invention is the recognition that the relative
vibratory movement which is permitted between the lower body 64 and
electrical pickup 12 is confined to the high frequency movement of
the vibrating surface 24, whereas in contrast thereto the relative
vibratory movement between the other magnetic body 60 and the
electrical pickup 12 is confined to the low frequency movement of
the surface 26. It is in this manner that the improved pickup 10
hereof effectively contributes to the reproduction of the full
range of auditory output of the drum 10 including, for example, the
low frequency output thereof as exemplified by the booming sounds
produced by beating of the drumhead 26 and, at the other extreme,
the reproduction of the high-frequency output as exemplified by
brush stroking of the drumhead 26.
The foregoing selective vibration of the lower magnetic body 64 is
achieved by the direct application, under pressure, of the improved
pickup 10 against the vibrating drumhead 26 in the manner as
illustrated. That is, upper body wall 44 is provided with an
enclosure 68 for the depending end 70 of a threaded rod 72 which is
threadably disposed, as at 74, in the horizontally oriented bracket
leg 38. At its upper end, rod 72 has a handle 76 affixed to it to
facilitate threaded adjustment thereof. It is contemplated that rod
72 be threadably adjusted so as to firmly press the lower end of
electrical pickup 12 against the diaphragm 64 and the diaphragm 64,
in turn, pressed firmly into the vibrating surface 26. The extent
of applied pressure will be understood to be such that there can be
little relative vibration between the vibrating surface 26 and the
electrical pickup 12 save for very high frequency vibration. That
is, in the same way that vibration is felt when pressing against a
vibrating surface, the electrical pickup 12 similarly "senses" that
same extent of vibration when it is pressed, as just described,
firmly against the peripheral portion of the vibrating drumhead 26.
In practice, it has been found that this sensed vibration is
effective in producing electrical signals in the coil 18 which
result in the faithful reproduction of brush strokes applied to the
drumhead 26.
The low frequency audio output of the drum 24 is converted into
corresponding electrical signals preparatory to subsequent
amplification and conversion back to audio output by the relative
vibratory movement between the electric pickup 12, which vibrates
in unison with the vibrating surface 26, and the upper magnetic
body 60 which also vibrates, but in an out-of-phase vibration
pattern relative to the pickup 12. That is, the vibration of the
pickup 12 sets into vibration the elastomeric body 50 which is
located in the oversized compartment 48 and the movement thereof,
in turn, sets into vibration the body 60 which is located in the
oversized internal compartment 58 of body 50. Moreover, as best
understood, the vibration pattern thus induced in the body 60 is
related to the low-frequency or high-amplitude movements of the
vibrating surface 26 since, in practice, it has been found that
this vibratory movement of the body 60 is effective in reproducing
the low frequency sounds of the drum.
The manner in which the vibrating pickup 12 sets into vibration the
body 60, as just described, can perhaps best be likened to what
occurs when a person shakes dice, wherein the movement of the dice
within the confined area formed by the person's clenched fingers is
related to the overall movement of the person's hand. In any event,
as already noted, it has been found that the relative vibration
between the body 60 and electrical pickup 12 results in faithful
reproduction of the low frequency audio output of the drum 24.
In experimenting with the improved pickup 10, a transparent cup 40
was utilized in conjunction with a resilient body 50 having a
transparent window therein so that the vibration of the magnetic
body 60 could actually be observed during operation of the improved
pickup 10. During such observation, vibration of the improved
pickup 10 was clearly visible, but the magnetic body 60 appeared to
remain stationary. This observation confirmed that during operation
of the improved electrical pickup 10, and more particularly, as a
result of vibration of the drum surface 26, such vibration sets
into vibration the electrical pickup 12 and also the magnetic body
60 in accordance with different vibration patterns so that there is
relative movement therebetween which is related to the vibration of
the vibrating surface 26. As a consequence of this relative
movement, the magnetic body 60 causes shifting in the magnetic
field of the pickup 12 which, in turn, induces electrical signals
in the coil 18 which are transmitted via the conductors 20 and 22
to sound-reproducing equipment.
GUITAR PICKUP
in FIGS. 3, 4a, 4b and 5, the same reference numbers are used to
designate parts already described in connection with FIGS. 1 and 2
that are similar in construction or similar in function. The major
difference is that the pickup 10 hereof is shown applied to a
guitar 78 including a body 80 having a top sounding board or
vibrating surface 82. Appropriately extended from the body 80 is a
neck 84, in the end of which are suitably disposed a number of
upstanding pegs 86. Stretched between a tail piece 88 and the pegs
86 are the six strings 90 of the guitar 78. Also shown in FIG. 3 is
a bridge 92 which functions to properly space the strings 90 one
from the other and in a clearance position above the body surface
82.
Reference is now made to the first mounting embodiment for the
pickup 10 illustrated in FIG. 4a. Strings 90 will be understood to
be fabricated of plastic or other nonconductive material and are
seated, as already noted, in bridge 92, which will be understood to
be fabricated of wood or similar nonconductive material. Bridge 92
is extended through an opening 94 in the surface 82 and is
supported in a clearance position above the surface from below.
Specifically, bolts 96 and 98 are operatively arranged in depending
relation from the surface 82 into the interior of the body 80 and
are connected, at their lower end, to a bracket 100 by nuts 102,
104 threadably engaged to the bolts 96, 98.
Welded or otherwise fixedly secured to the bracket 100 is the outer
housing or cup 40 of the pickup 10. As illustrated in FIG. 4a, the
internal construction of the pickup 10 is similar to that already
described in connection with FIG. 2 in that within the cup 40 there
is an elastomeric body 50 having an oversized compartment 58 for
the low-frequency magnetic body or diaphragm 60. At its opposite
end, the pickup 10 includes the usual pole pieces, one such pole
piece 14 being illustrated in crossing relation to the lengthwise
orientation of the strings 90. Immediately above the pole pieces is
an insulating felt layer 66 and then a high-frequency magnetic body
or diaphragm 64 in interposed position between the felt layer 66
and the bottom of the wooden bridge 92. Completing the construction
of the pickup 10 is a coil 18 having conductors 20 and 22 through
which the electrical signals are transmitted to sound-reproducing
equipment.
It should be readily appreciated from the description of the mode
of operation of the pickup 10 provided in connection with FIGS. 1
and 2 that vibration of the strings 90 produces corresponding
vibration of bridge 92 and also of the body surface 82.
Specifically, the vibration of bridge 92 is transmitted to the
diaphragm 64 which is in an interposed position between it and the
signal-producing components of the pickup 10 and ultimately causes
reproduction of the high-frequency musical tones of the instrument.
It should be noted that, in the mounting of FIG. 4a, the
pressure-applying bracket 28 has been dispensed with since the
diaphragm 64 is firmly confined between the pickup pole pieces 14
and the bridge 92 by virtue of the established depending position
for the pickup 10 provided by the bolts 96, 98 and the downward
bias or urgency 106 provided by the taut instrument strings 90.
During playing use of the guitar 78, vibration of the strings 90 is
transmitted to the body surface 82 and is, in turn, transmitted to
the pickup body 40 in much the same way as the previously described
drum head 26 was effective in transmitting vibration to the pickup.
In response to this vibration, the diaphragm 60 is set into
vibration in a pattern which is related to but is nevertheless out
of phase with the vibration of the pickup body 40. As a
consequence, the relative movement between the diaphragm 60 and the
magnetic field of the pickup 10 results in shifting in this
magnetic field which, in a well understood manner, in turn results
in signals being produced in the coil 18 and transmitted through
the conductors 20, 22 to the amplifiers and other sound-reproducing
equipment. In practice, it has been found that diaphragm 60 is
effective in causing reproduction of the low-frequency musical
tones of the guitar 78.
Reference is now made to the mounting embodiment of FIG. 4b which
will be understood to be similar in all respects to that described
in connection with FIG. 4a, except that bridge 92 is fabricated of
metal and thus can itself effectively serve the purposes served by
the diaphragm 64 which can therefore be dispensed with. For
brevity's sake, the description of the mode of operation of the
pickup 10 in its mounting of FIG. 4b will not be repeated except to
note that it is vibration of the bridge 92 as produced therein by
the strings 90 which is effective in causing reproduction of the
high-frequency musical tones of the instrument, and that diaphragm
60 is instrumental in causing faithful and accurate reproduction of
the low-frequency musical tones of the instrument when it is set
into vibration within the oversized compartment 58 of the resilient
pad 50 when the pickup body 40 is itself set into vibration by the
vibrating body surface 82.
Reference is now made to FIG. 5 in which still another mounting
variation for the pickup 10 is illustrated. As shown, pickup 10
will not be, and indeed is not located where the bridge 92 is
located. Rather, a different location is selected at which the
upper portion or pole pieces of the pickup are projected through an
opening 108 in the body surface 82 in sound-reproducing relation to
the instrument strings 90 which extend in a clearance position over
the pickup 10 between the pegs 86 and bridge and tail piece 92, 88.
and it will be understood that the strings 90 are metallic or
otherwise fabricated of conductive material and, being within the
magnetic field of the pickup 10, are thus capable, when set into
vibration, of directly causing sound-reproducing signals in the
pickup coil 18. Specifically, these signals reproduce the
high-frequency musical tones of the instrument whereas diaphragm 60
in the oversized compartment 58 bounded by the resilient walls 50
are effective, as already noted, in causing reproduction of the
low-frequency musical tones of the instrument when set into
vibration by the vibrating pickup body 40. Since, in this
embodiment the strings 90 do not exert a downward holding force 106
on the pickup 10, use preferrably is made of additional nuts 110
and 112 to hold the pickup 10 in its depending position on the
bolts 96 and 98.
SUMMARY
From the foregoing, it should be readily appreciated that there has
been described herein an improved electrical pickup 10 which, among
other noteworthy aspects, is characterized in that it is directly
mounted to the vibrating surface of the musical instrument. This is
in contrast to prior art electrical pickups wherein at least one
part thereof, whether it be the permanent magnets, coil, or
field-influencing magnetic body, is required to be stationarily
mounted, and remaining parts thereof mounted for vibration in
unison with the vibrating surface. Thus, by eliminating the need
for any stationary mounting in any of the parts of the electrical
pickup, significant and critical problems heretofore encountered in
the installation of the electrical pickup have been obviated.
Further, the faithfulness with which the improved pickup 10
reproduces the audio output of a musicel instrument is greatly
enhanced, as is also the extent of the range of the audio output.
Still further, by varying the mass of the magnetic body 60,
different noteworthy musical effects can be achieved. For example:
a small cymbal can be made to sound like a large, gong-like cymbal
by using a comparatively large mass magnetic body 60; a large
cymbal can be thinned out in the low frequencies by using a
comparatively small mass magnetic body 60; and a tympani effect can
be achieved on a small tom-tom by using a comparatively large mass
magnetic body 60.
Also, as already noted, the improved pickup 10 is not limited to
use in conjunction with only a drum and a guitar or the like, but
can also be used with good results to electrically reproduce the
sounds of a piano, the said pickup 10 being applied to the sounding
board of the piano.
It should furthermore be noted that the improved pickup 10 hereof
is directly operated by, and thus only reproduces the sounds of,
the vibrating surface of the musical instrument. It is thus
unaffected by extraneous noise, as is a conventional microphone or
the like. This is of obvious significant advantage in recording
music in that it eliminates the need for sound-proof studios and
the procedures therein which are now used to avoid distracting
extraneous noise or sounds in the recorded tape or record.
A latitude of modification, change and substitution is intended in
the foregoing disclosure, and in some instances some features of
the invention will be employed without a corresponding use of other
features. Accordingly, it is appropriate that the appended claims
be construed broadly and in a manner consistent with the spirit and
scope of the invention herein.
* * * * *