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JPS5293303

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DESCRIPTION JPS5293303
Description 1, title of the invention
Monaural playback listening device
3. Detailed Description of the Invention The present invention relates to a monaural playback
listening apparatus capable of eliminating the drawback in the case of listening to a monaural
signal obtained by a radio receiver or the like with an earphone etc., ie the defect that the sound
image is localized in the head. It is a thing. In general, when a monaural signal obtained by a
radio receiver or the like is reproduced by a speaker for listening, the sound radiated from the
speaker directly reaches both ears as a direct sound and is reflected by the wall of one listening
room, a floor, etc. Reaches both ears as an indirect sound. Thus, when the synthesized sound of
direct sound and indirect sound reaches both ears, the listener recognizes the sound image
outside the listener's head. This is because indirect sound does not contribute to the sense of
distance to the sound image. On the other hand, when a monaural signal obtained by a radio
receiver or the like is reproduced by an earphone or the like to be heard, the sound image is
localized in the head of the listener. This is because, in the case of listening with the earphone,
unlike the case of the above-mentioned speaker listening, the indirect sound is included and it is
dangerous. In the present invention, indirect sound is generated by passing the sound
reproduced by an electroacoustic transducer such as an earphone, a speaker, etc. to the above
point via a residual attachment device of a mechanical acoustic system, and this indirect sound is
mixed with direct sound. The present invention provides a monaural reproduction listening
apparatus for localizing the synthesized sound outside the head of a sound image by listening to
both ears of the synthesized sound K. In the following, IC # MIK will be described with reference
to the drawings according to the present invention. The first factor is a block diagram showing
the basic configuration of the uninvented apparatus, and in FIG. 1, 1 is a radio receiver. A signal
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source such as a tape retarder, a tire, or a player, and an electroacoustic transducer 2 for
converting an electric signal from the signal source 1 into a sound wave. The sound wave emitted
from the electroacoustic transducer 2 Sound transmission passage a. Pass through 4 and be
transmitted as direct sound to the listener's left and right ears. Reference numerals 6 and 6
respectively denote supports at the tip end KWk of the sound wave transmission passage 3 ° 4.
The tips of the sound wave transmission passages 3 and 4 such as a groove are ears of the
listener by the support tool 6 ° 6. It is attached to the department. 7 is an electric sound 411
converter for converting an electric signal from the signal source 1 into a sound wave, and 8 is
the above-mentioned electroacoustic conversion! ! 7 is delay means such as a spring for delaying
the sound wave generated at 7 with respect to the direct sound at time T, and the reverberation
effect addition device is Jle by the electroacoustic transducer 7 and the delay means 8, The
indirect sound added with the reverberation effect generated by the cutting Il effect adding
device is led to the mixer 11.12 through the phase shifters 9, 1Q. In the mixer 11.12, the direct
sound transmitted through the sound wave transmission paths 3 and 4 and the indirect sound
obtained through the phase shifter 9.10. This is a book whose synthesized sound is conducted to
the listener's left and right ears.
As described above,% as shown in FIG. 1, when the direct sound and the dark EndPage: 2 false
sound are transmitted to the listener's left and right ears, the sound image is different from the
case where the earpiece is listened to by the earpiece. It is something that the pressure outside
the head is fixed. When the phase difference (1ζ1- ら れ る 21) of each indirect sound phaseshifted by the phase shifter 9 ° 10 is 180 ′ ′, the sense of distance to the sound image can be
obtained better. Examples of the present invention will be described below. [Embodiment 1] In
FIG. 2 IFT, 13 is a cylinder, and the internal space of the cylinder 1a is divided by the partition
plate 14 into spaces A and BK. A speaker 2 is provided at the space A side end of the cylindrical
body 13, and a hole 16.16 is a hole formed in the cylindrical body 13. The hole 155.16 passes
through the space AK. 17.18-each end is fitted in the holes 15 and 16 / eve, and the sound wave
radiated from the space AK by the speaker 2 is a direct sound through the veve 17.18 and a
listener Transmitted to the left and right ears. 7 is a speaker mounted on the empty rlRB * @ NK
of the cylindrical body 13; 1G is a spring having one end fixed to the partition plate 14 and the
other end fixed to a vibrating portion such as a diaphragm of the speaker 7; The vibration of the
diaphragm 7 is transmitted to the coiled spring 19 as a mechanical vibration. The transmission
speed v8 of mechanical vibration transmitted to the spring 19 is Vs = (d / D) × (gG / 2c) ′ / but
only the diameter of the double spring, the diameter of the double spring, the shear elasticity of
the double spring material The specific gravity of the double spring material, q: acceleration of
the spring, and further assuming that the turn teaching of the spring 19 is n, the delay time of
the sound wave radiated from the speaker 7 compared to the sound wave radiated from the
speaker 2 is Reference numeral 20 denotes a hole formed in the cylinder 13 such that T = jrnD /
VB, and the hole 2o communicates with the space B to be h. Reference numeral 21 denotes a
pipe branched from the middle of the eve 17. The end of the squeegee 21 is fitted in the hole 20.
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A lid 22 closes one end of the cylinder 1a, and a hole 23 is formed in the lid 22. Reference
numeral 24 denotes a pipe which is branched from the middle of the pipe 18 and the end of the
pipe 24 is fitted in the hole 23. The sky 111 from the above speaker 7! The indirect sound
radiated to the B side is conducted to the pipe 17 via the-/-ive 21 and mixed with the direct
sound transmitting the heave 17 and transmitted to one of the listener's ears. On the other hand,
the indirect sound radiated to the rear of the skie cuff is conducted to the nose gear 18 through
the nose 24 and mixed with the direct sound transmitting the nose 18 and transmitted to the
other ear of the listener.
In addition, since the indirect sound transmitting the noise 2'l, 24 is a sound wave radiated to the
front and back of the diaphragm of the speaker 7, the phase difference of the inter-rain
anomalous sound is 18 o @ . In FIG. 2, the speaker end is attached to the lid 22, and one end of
the squelling 19 is fixed to the lid 22 and the other end is fixed to the vibrating portion of the
speaker 7. [Embodiment 2] FIG. 3 shows a second embodiment of the present invention. The
same reference numerals as in the embodiment shown in FIG. 2 denote the same parts. In FIG. 3,
reference numeral 26.26 is a spring in which one report is fixed to the cylinder 13 and the other
end is fixed to the coupler 27, and the coupler 2T and the diaphragm of the speaker 7 are rigid.
It is connected by the line 28. A spring may be used instead of the rigid line 28 shown in FIG.
[Embodiment 3] FIG. 4 shows a fourth embodiment of the present invention, and the same
reference numerals as in the embodiment shown in FIG. In FIG. 4, a speaker 22 is attached to the
above-mentioned attachment 22 ′ ′. In addition, the wood mounting Hc (the mounting of the
speakers 2, 7 in the direction is the reverse of the embodiment shown in FIG. 3). In the
embodiment shown in FIG. Install the spring 2 as a spring, and the speaker 2 on the other side. It
is possible to reverse the feeding direction. From the above example, the invention uses two
electroacoustic transducers such as 41 # 4 from the above embodiment, one electric soundconverter emits a direct sound, the other electroacoustic transducer has a phase EndPage: 3 By
emitting different indirect sounds and transmitting the synthesized direct and indirect sounds to
the left and right ears of the listening sound, the following effects can be obtained. (1) Since the
sound image settles outside the head of the hearing, fatigue sensitivity is reduced. (2) The
structure is simple because the button and the mechanical sound system are used without using
an electric circuit and electric parts. (3) It can be manufactured inexpensively.
4. Brief Description of the Drawings FIG. 1 is a block diagram showing a basic configuration of
the monaural reproduction listening apparatus of the present invention, and FIGS. 2 to 4 are
schematic diagrams of the embodiments of the present invention, respectively. 1 · · · · · · · · · · · · · · ·
· · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · 5 · 6 @---support, 13 · · · · 11-11 t Ii body, 14
buildings · · · · 115, 16- 1 book hole, 17 1g, 21 ° 24 ··· fist · Δ Δ Eve, 19 ··· spring · 20 · 1 · · hole
22 22, 22 '22' · · · · · 1 II i body, 23, 2300. . , Holes, 25.26-00. . Large pulling, 27-. · · · · · · · · · · · · · ·
· · · Rigid line. Name of agent Attorney Nakao and others 1 person Figure 2 ■ EndPage: 4
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