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JP2017527177

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DESCRIPTION JP2017527177
Abstract A sound device (10) has a neck loop (12) configured and arranged to be worn around
the neck. The neck loop comprises a housing comprising a first acoustic waveguide (110) having
a first sound emitting opening (50) and a second acoustic waveguide (160) having a second
sound emitting opening (40). (13) is included. A first back-opened acoustic driver (14)
acoustically coupled to the first waveguide (110) and a second back-opened acoustic driver
acoustically coupled to the second waveguide (160) There is (16).
Acoustic device
[0001]
This disclosure relates to acoustic devices.
[0002]
The headset has an acoustic driver placed on or in the ear, on the ear.
Headsets are somewhat annoying to wear this way, and can interfere with the user's ability to
hear ambient sounds.
[0003]
All examples and features described below can be combined in any technically possible manner.
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[0004]
The acoustic device directs high quality sound to each ear without using an acoustic driver on
the ear, over the ear or in the ear.
The acoustic device is designed to be worn around the neck. The acoustic device can include a
neck loop having a housing. The neck loop can have a "horseshoe-like" or generally "U-shaped"
shape with two legs placed above or near the clavicle and a curved central portion placed behind
the neck . The acoustic device can have two acoustic drivers, one for each leg of the housing. The
driver can be located below the expected position of the user's ear, with the driver's acoustic axis
facing towards the ear. The acoustic device may further include two waveguides in the housing,
each waveguide having an outlet below the ear and near the driver. The back side of one driver
can be acoustically coupled to the entrance of one waveguide, and the back side of the other
driver can be acoustically coupled to the entrance of the other waveguide. Each waveguide has
one end where the driver that supplies the sound is located below one ear (left or right) and the
other end where the driver for sound is located below the other ear (right or left). And an open
end).
[0005]
The waveguides can be folded together within the housing. The waveguides can be configured
and arranged such that the inlet and the outlet of each waveguide are located at the top side of
the housing. The waveguides can be configured and arranged such that each waveguide has the
same cross-sectional area throughout the length of the waveguide. Each waveguide begins
immediately after one driver and extends down along the top portion of the housing in the
adjacent leg of the neck loop to the end of the leg and bends down to the bottom portion of the
housing, up the leg The waveguide can be configured and arranged to bend 180 degrees back to
and then traverse the central portion and back down the top portion of the other leg to the exit
located immediately after the other driver. Each waveguide can be flipped from the bottom to the
top of the housing within the central portion of the neck loop.
[0006]
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In one aspect, the acoustic device includes a neck loop configured and arranged to be worn
around the neck. The neck loop includes a housing comprising a first acoustic waveguide having
a first sound emitting opening and a second acoustic waveguide having a second sound emitting
opening. There is a first back-opened acoustic driver acoustically coupled to the first waveguide
and a second back-opened acoustic driver acoustically coupled to the second waveguide.
[0007]
Embodiments can include one of the following features, or any combination of these features.
The first acoustic driver and the second acoustic driver may be driven such that the first acoustic
driver and the second acoustic driver emit sounds that are out of phase across at least a portion
of the spectrum. A first back-opened acoustic driver can be held by the housing, and the acoustic
driver can have a first sound axis directed generally at the expected location of one of the user's
ears, A second back-opened acoustic driver can also be held by the housing, which acoustic
driver can have a second sound axis directed generally at the expected location of the user's
other ear . The first sound emitting opening may be located proximate to the second acoustic
driver, and the second sound emitting opening may be located proximate to the first acoustic
driver. Each waveguide has one end at the corresponding acoustic driver located at one side of
the head and close to the adjacent ear and below the ear, and the other side of the head and the
other adjacent And the other end leading to the sound emitting opening of the waveguide located
below the ear in close proximity to the ear.
[0008]
Embodiments may include one of the features described above or below, or any combination of
these features. The housing can have an outer wall, and a first sound emitting opening and a
second sound emitting opening can be defined in the outer wall of the housing. The first and
second waveguides may both be defined by the outer wall of the housing and the inner wall of
the housing. The inner wall of the housing may be placed along a longitudinal axis that twists
180 degrees along the length of the longitudinal axis. A neck loop having a central portion and
first and second leg portions having tips depending from the central portion and spaced apart to
define an open end of the neck loop; It may be generally "U-shaped", with the kink in the housing
inner wall being located in the central portion of the neck loop. The inner wall of the housing is
generally flat and lies below both sound emitting openings. The inner wall of the housing can be
provided with raised sound redirecting sections under each of the first sound emitting opening
and the second sound emitting opening. The housing may have an upper portion facing the ear
when worn by the user, the first sound emitting opening and the second sound emitting opening
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being defined in the upper portion of the housing.
[0009]
Embodiments may include one of the features described above or below, or any combination of
these features. The housing can have a top portion closest to the ear when worn by the user and
a bottom portion closest to the torso when worn by the user, each waveguide being within the
top portion of the housing One part may be placed in the bottom part of the housing and the
other. The neck loop includes a central portion and a first leg portion and a second leg portion
having a tip depending from the central portion and spaced apart to define the open end of the
neck loop, the whole Can be "U-shaped" as. The kink in the housing inner wall can be located in
the central portion of the neck loop. The first acoustic driver can be located in a first leg portion
of the neck loop and the second acoustic driver can be located in a second leg portion of the neck
loop. The first waveguide can start under the first acoustic driver and can extend along the top
portion of the housing to the tip of the first leg portion of the neck loop, to the bottom portion of
the housing And the first waveguide extends along the first leg portion to the central portion of
the neck loop which bends to the upper portion of the housing and extends to the second leg
portion to the first sound emitting opening can do. The second waveguide can start under the
second acoustic driver and on the top portion of the housing to the tip of the second leg portion
of the neck loop where the second waveguide bends to the bottom portion of the housing The
second leg to the central portion of the neck loop, which can extend along, and the second
waveguide bends to the upper portion of the housing and extends to the first leg portion to the
second sound emitting opening It can be stretched along the part.
[0010]
In another aspect, an acoustic device is a neck loop configured and arranged to be worn around a
neck, the neck loop having a first sound emitting aperture and a first acoustic waveguide A neck
loop comprising: a housing including a second acoustic waveguide having a second sound
emitting opening; and a first back-opened acoustic driver acoustically coupled to the first
waveguide, A first back-opened acoustic driver, the first back-opened acoustic driver being held
by the housing and having a first sound axis generally directed at an expected position of one of
the user's ears; A second back-opened acoustic driver acoustically coupled to the second
waveguide, the second back-opened acoustic driver being held by the housing and at an expected
position of the other ear of the user All A second back-opened acoustic driver having a second
acoustic axis directed as the first acoustic emission opening is positioned proximate to the
second acoustic driver, the second acoustic emission opening The opening is located close to the
first acoustic driver, and the first acoustic driver and the second acoustic driver cause the first
acoustic driver and the second acoustic driver to emit sounds of different phases. It is driven.
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[0011]
Embodiments can include one of the following features or any combination of these features.
The waveguide may be both defined by the outer wall of the housing and the inner wall of the
housing, the inner wall of the housing being placed along a longitudinal axis which twists 180 °
along the length of the longitudinal axis. The neck loop includes a central portion and a first leg
portion and a second leg portion having a tip depending from the central portion and spaced
apart to define the open end of the neck loop, the whole The "U" shape can be as, the kink in the
housing inner wall being located in the central part of the neck loop. The housing can have a top
portion closest to the ear when worn by the user and a bottom portion closest to the torso when
worn by the user, each waveguide being within the top portion of the housing One part is placed
in and in the bottom part of the housing.
[0012]
In another aspect, an acoustic device is a neck loop configured and arranged to be worn around a
neck, the neck loop having a first sound emitting aperture and a first acoustic waveguide A
housing including a second acoustic waveguide having a second sound emitting opening, the first
waveguide and the second waveguide both being both defined by the outer wall of the housing
and the inner wall of the housing, The inner wall is placed along a longitudinal axis that twists
180 ° along the length of the longitudinal axis, and the neck loop is spaced from the central
portion as well as hanging from the central portion and defining an open end of the neck loop A
first leg portion and a second leg portion having an end portion spaced apart from each other
and generally in a "U" shape, the torsion portion in the housing inner wall being a central portion
of the neck loop And the housing has a top portion closest to the ear when worn by the user and
a bottom portion closest to the torso when worn by the user, each waveguide being the top
portion of the housing It includes a neck loop, a portion of which is located within and a portion
within the bottom portion of the housing. There is a first back-opened acoustic driver acoustically
coupled to the first waveguide, wherein the first back-opened acoustic driver is located in a first
leg portion of the neck loop and one of the users Have a first axis of sound that is directed as a
whole at the expected location of the ear. There is a second back-opened acoustic driver
acoustically coupled to the second waveguide, wherein the second back-opened acoustic driver is
located within the second leg portion of the neck loop and is the other of the user Have a second
sound axis directed as a whole to the expected position of the The first acoustic driver and the
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second acoustic driver are driven such that the first acoustic driver and the second acoustic
driver emit sounds that are out of phase. The first sound emitting opening is located proximate to
the second acoustic driver, and the second sound emitting aperture is located proximate to the
first acoustic driver. The first waveguide starts under the first acoustic driver and extends along
the top portion of the housing to the tip of the first leg portion of the neck loop where the first
waveguide bends to the bottom portion of the housing And the first waveguide extends along the
first leg portion to the central portion of the neck loop that bends to the upper portion of the
housing and extends to the second leg portion to the first sound emitting opening , The second
waveguide starts under the second acoustic driver and along the top portion of the housing to
the tip of the second leg portion of the neck loop where the second waveguide bends to the
bottom portion of the housing Extending and extending along the second leg portion to the
central portion of the neck loop which bends the second waveguide to the upper portion of the
housing and extends to the first leg portion to the second sound emitting opening Do.
[0013]
It is a top perspective view of an acoustic device. FIG. 5 is a top perspective view of an acoustic
device worn by a user. It is a right view of an acoustic device. It is a front view of an acoustic
device. It is a rear view of an acoustic device. FIG. 5 is a top perspective view of the internal
bulkhead or wall of the acoustic device housing. 7 is a first cross-sectional view of the acoustic
device taken along line 7-7 of FIG. 1; FIG. 8 is a second cross-sectional view of the acoustic device
taken along line 8-8 of FIG. 1; 9 is a third cross-sectional view of the acoustic device taken along
line 9-9 of FIG. 1; FIG. 1 is a schematic block diagram of electronic components for an acoustic
device. FIG. 7 is a plot of sound pressure levels at the dummy head ear where the driver of the
acoustic device is driven both in phase and out of phase.
[0014]
The acoustic device directs high quality sound to the ear without directly contacting the ear and
without interrupting surrounding sounds. The acoustic device may be worn under the garment or
on the garment (if the garment is sufficiently acoustically transparent) rather than offensive.
[0015]
In one aspect, the acoustic device is configured and arranged to be worn around the neck. The
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acoustic device has a neck loop that includes a housing. The neck loop has a horseshoe-like
shape including two legs placed over the top of the torso on both sides of the neck and a curved
central part located behind the neck. The device has two acoustic drivers, one for each leg of the
housing. The driver is located below the expected position of the user's ear with the driver's
acoustic axis facing the ear. The acoustic device also has two waveguides in the housing, each
having an outlet below the ear and near the driver. The back side of one driver is acoustically
coupled to the entrance to one waveguide, and the back side of the other driver is acoustically
coupled to the entrance to the other waveguide. Each waveguide has one end where the driver
that supplies the sound is located below one ear (left or right) and the other end where the driver
for sound is located below the other ear (right or left). And an open end).
[0016]
A non-limiting example of a sound device is shown in the drawings. This is however one of the
many possible examples that will illustrate the subject sound device. The scope of the invention is
not limited by the examples, but rather supported by the examples.
[0017]
The acoustic device 10 (FIGS. 1-9) comprises a horseshoe-shaped (or possibly generally “Ushaped”) neck loop 12 which, for example, as shown in FIG. The neck loop is shaped, configured
and arranged to be worn around the neck of a person. The neck loop 12 hangs from the central
portion 24 at the curved central portion 24 located at the neck line of the neck "N", generally
above or near the clavicle "C" at the top of the torso on either side of the neck And a right leg 20
and a left leg 22 configured and arranged to lean. Figures 3-5 illustrate the overall shape that
helps the acoustic device 10 to be comfortably seated on the upper area of the neck and chest.
[0018]
The neck loop 12 comprises a housing 13 which is essentially an elongated (hard or flexible)
mostly hollow rigid plastic tube (introduction and emission openings for sound) with closed tips
27 and 28 Except for The housing 13 is internally divided by an integral wall (partition wall)
102. The two inner waveguides are defined by the outer wall of the housing and the partition
wall. The housing 13 should be sufficiently hard so that sound does not substantially deteriorate
as it passes through the waveguide. In this non-limiting example, the lateral distance "D" between
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the end 27 of the right neck loop leg 20 and the end 28 of the left neck loop leg 22 is less than
the width of a typical human neck The neck loop also needs to be sufficiently flexible so that the
ends 27 and 28 separate and return to the resting configuration shown in the drawings when
wearing and removing 10. One of the many possible materials with appropriate physical
properties is polyurethane. Other materials can be used. The device can also be configured in
other ways. For example, the device housing can be made of a number of separate parts that are
joined together using, for example, fasteners and / or adhesives. And there is no need to position
the neck loop leg so that the neck loop leg must be released when the device is placed behind the
neck with the leg leaning on the upper part of the chest.
[0019]
The housing 13 holds the right acoustic driver 14 and the left acoustic driver 16. The driver is
located at the top surface 30 of the housing 13 below the expected position of the ear "E". See
FIG. The housing 13 has a lower surface 31. The driver's acoustic axis (not shown in the drawing)
needs to be directed as a whole to the expected position of the wearer's / user's ear, so the driver
is pointed backwards (backwardly) Can be tilted or angled. The driver can have an acoustic axis
directed at the expected position of the ear. Each driver was measured approximately 10 cm
from the expected position of the closest ear and approximately 26 cm from the expected
position of the other ear (this distance was measured with a flexible tape passing under the chin
to the farthest ear ) May be. The lateral distance between the drivers is about 15.5 cm. This
arrangement results in a sound pressure level (SPL) from the driver that is approximately three
times larger at the closer ear than the other ear, which helps to maintain channel separation.
[0020]
Waveguide outlets 40 and 50 are located in the upper outer wall 30 of the housing 13 just aft
near the driver. The outlet 50 is the outlet for the waveguide 110 with an inlet behind the right
driver 14. The outlet 40 is an outlet for the waveguide 160 having an inlet behind the left driver
16. See FIGS. 7-9. Thus, each ear receives directly the output from the front of one driver and the
output from the back of the other driver. If the two drivers are driven out of phase, the two
acoustic signals received by each ear are virtually in phase below the quarter wave resonant
frequency of the basic waveguide. And this resonant frequency is about 130 Hz to 360 Hz in this
non-limiting example. This ensures that the low frequency radiation from each driver and from
the corresponding waveguide outlet on the same side is in phase and does not cancel each other.
At the same time, the radiation from the opposite driver and from the corresponding waveguide
is out of phase, thus providing far field cancellation. This reduces the sound leakage from the
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sound device to others nearby.
[0021]
Acoustic device 10 includes right and left button socks or partial housing covers 60 and 62,
which include a volume button 68, a power button 74, a control button 76, and an opening 72
that exposes a microphone, etc. A sleeve that can define or support aspects of the user interface
of the device. When present, the microphone enables the device to be used to make a call (like a
headset). Other buttons, sliders and similar controls can be included as desired. The user
interface can be configured and arranged to facilitate user manipulation. Individual buttons can
be uniquely shaped and placed so that they can be recognized without looking at the buttons.
The electronic component cover is located below the button sock. The printed circuit board and
battery holding the hardware necessary for the functioning of the acoustic device 10 are located
below the cover.
[0022]
Housing 13 includes two waveguides 110 and 160. See FIGS. 7-9. The sound enters the
waveguides just behind / below the driver, the driver extends down the top side of the neck loop
leg located at the end of the leg and turns 180 ° at the end of the leg, the housing Down to the
bottom side and then extend back up the legs along the bottom side of the housing. The
waveguide continues along the bottom side of the first portion of the central portion of the neck
loop. The waveguide is then twisted so that it returns to the top side of the housing at or near the
end of the central portion of the neck loop. The waveguide terminates near the other driver at
the emission opening located above the other leg of the neck loop. The waveguide is formed by
the space between the outer wall of the housing and the integral partition or wall 102. The
bulkhead 102 (shown separately from the housing in FIG. 6) has a generally flat integral inner
housing having a right leg 130, a left leg 138, a right end 118, a left end 140, and a central 180
° twist 134. It is a wall. The septum 102 also includes curved angled diverting portions 132 and
136 that direct sound from the waveguide extending substantially parallel to the housing axis to
the emitting aperture, the emitting aperture being above the diverting portion. It is in the top
wall of the housing so that the sound is directed towards one ear as a whole.
[0023]
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A first portion of waveguide 110 is shown in FIG. The waveguide inlet 114 is located directly
behind the back surface 14a of the acoustic driver 14 with the front side 14b pointing towards
the expected position of the right ear. The lower leg 116 of the waveguide 110 is located above
the partition 102 of the housing and below the top wall / top surface 30. A turnback 120 is
defined between the end 118 of the septum 102 and the closed rounded end 27 of the housing
12. The waveguide 110 then continues to the upper portion 122 of the waveguide 110 below the
bulkhead 102. The waveguide 110 then extends below the turnaround portion 132 (see
waveguide portion 124) which is part of the partition 102, where the waveguide is bent to
extend into the central housing portion 24. FIGS. 8 and 9 show how two identical waveguides
110 and 160 extend along the central portion of the housing and fold over each other in the
central portion of the housing, resulting in each waveguide It illustrates how it starts and ends in
the upper part of the housing. This allows each waveguide to be coupled behind one driver in
one leg of the neck loop and to have a waveguide outlet at the top of the housing in the other leg
near the other driver Do. Also, FIGS. 8 and 9 start at the second end 140 of the septum 102 and
behind the driver 16 and the waveguide bends to the bottom of the leg 22 and extends up the leg
22 to the central portion 24 The arrangement of waveguides 160 extending down to the top of
the legs 22 is also shown. Waveguides 110 and 160 are essentially mirror images of one
another.
[0024]
In one non-limiting example, each waveguide has the same overall cross-sectional area of about 2
cm <2> along the entire length of the waveguide, including the generally annular emission
aperture. In one non-limiting example, each waveguide has an overall length very close to 43 cm
in one particular example, in the range of about 22 cm to 44 cm. In one non-limiting example,
the waveguide is long enough to cause resonance at about 150 Hz. More generally, the main
dimensions of the acoustic device (e.g. waveguide length and cross-sectional area) are mainly
defined by ergonomics, while ensuring proper acoustic response and function by proper audio
signal processing. Other waveguide arrangements, shapes, sizes, and lengths are assumed to be
within the scope of the present disclosure.
[0025]
An exemplary but non-limiting example of an electronic component for an acoustic device is
shown in FIG. In this example, the device acts as a wireless headset that can be wirelessly
connected to a smartphone or another sound source. The PCB 103 holds the microphone 164
and the microphone processor. The antenna receives an audio signal (eg, music) from another
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device. Supports Bluetooth® wireless communication protocol (and / or other wireless protocols).
The user interface can be held as part of both the PCB 103 and the PCB 104, but it is not
necessary. The system on chip generates audio signals that are amplified and provided to the L
audio amplifier and the R audio amplifier on the PCB 104. The amplified signal is sent to the left
transducer (driver) 16 and the right transducer (driver) 14 which are back open acoustic drivers
as described above. The acoustic driver can have a diameter of 40 mm and a depth of 10 mm,
but it is not necessary to have these dimensions. Also, the PCB 104 maintains battery charging
circuitry that interacts with the rechargeable battery 106 to provide all power for the acoustic
device.
[0026]
FIG. 11 illustrates the SPL at one ear using the acoustic device described above. Plot 196 is with
a driver driven out of phase, and plot 198 is with a driver driven in phase. Below about 150 Hz,
SPLs of different phase are higher than in the case of in-phase drive. The advantage of driving
with out of phase is up to 15 dB at the lowest frequency of 60 Hz to 70 Hz. The same effect
occurs within the frequency range of about 400 Hz to about 950 Hz. Within the 150 Hz to 400
Hz frequency range, the in-phase SPL is higher than the SPL of the different phase, and the phase
difference between the left and right channels, for best driver performance in this frequency
range, It should be turned over to zero. In one non-limiting example, the phase difference
between the channels is realized using a so-called all pass filter with a limited phase change
slope. These provide slow phase changes rather than sharp phase changes that may have
deleterious effects on sound reproduction. This provides the advantage of proper phase selection
while ensuring the power efficiency of the acoustic device. Above 1 KHz, the phase difference
between the left and right channels has a much smaller impact on the SPL at higher frequencies
due to the lack of correlation between the channels.
[0027]
Embodiments of the systems and methods described above include computer components and
computer implemented steps that will be apparent to those skilled in the art. For example, one
skilled in the art will appreciate that the computer-implemented steps can be stored as computerexecutable instructions on a computer readable medium, such as, for example, a floppy disk, hard
disk, optical disk, flash ROM, non-volatile ROM, and RAM. It is. Moreover, those skilled in the art
will appreciate that computer-executable instructions may be executed on various processors,
such as, for example, microprocessors, digital signal processors, gate arrays, and the like.
Although the steps and elements of the systems and methods described above are not all, but are
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described herein as part of a computer system, for ease of discussion, each step or element
corresponds to a corresponding computer Those skilled in the art will recognize that the system
or software component may be included. Thus, such computer systems and / or software
components are enabled by describing these corresponding steps or elements (ie, their
functionality) and are within the scope of the disclosure.
[0028]
Many implementations have been described. Nevertheless, additional modifications can be made
without departing from the scope of the inventive concept described herein, and thus other
embodiments are within the scope of the following claims. Will be understood.
[0029]
DESCRIPTION OF REFERENCE NUMERALS 10 acoustic device 12 neck loop 12 housing 13
housing 14 acoustic driver 14 a back surface 14 b front side 16 acoustic driver 20 leg 22 leg 24
central portion 27 closed rounded end 28 end 30 outer wall 31 lower surface 40 outlet 50
released Outlet 60 Housing cover 62 Housing cover 68 Volume button 72 Opening 74 Power
button 76 Control button 102 Partition 103 PCB 104 PCB 106 Rechargeable battery 110 Wave
guide 114 Wave guide entrance 116 Lower leg 118 End 120 Folded portion 122 Upward
portion 124 Waveguide portion 130 Right leg 132 Direction changing portion 134 Twisted
portion 136 Direction changing portion 138 Left leg 140 Left end portion 160 Waveguide 164
Microphone 196 Plot 198 Plot C Collar bone D Lateral distance E Ear
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