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1 Address of the invention Address of Osaka Prefecture Kadoma city Oda Kamon 100 name
(582) Representative of Matsushita Electric Industrial Co., Ltd. Shoji Matsushita 4 Agent 〒 517
Address Osaka Prefecture Kadoma city Oza Kadoma 1006 Address list of attached documents ■
Japan Patent Office 0 Japanese Patent Laid-Open No. 52-j, published 10020 Japanese Patent No.
52. (1977) 1.27 Internal Serial Number Specification 1, Title of the Invention 1, Title of the
Invention Headphone Device
3q, 1 ° patent applicant
3. Detailed Description of the Invention The present invention relates to a headphone device for
reproducing a program source such as a record, magnetic tape, etc. and listening with a
headphone, listening to the program source with a speaker while listening with a bed phone The
book provides a headphone device in which the sound image is localized outside the head. FIG. 1
is a book showing the state of reproducing a program source such as a record or magnetic tape
and listening to a speaker indoors. In the first factor, 1 is a reproducing apparatus for
reproducing the program source, and 2 and 3 are each A speaker for converting the left and right
signals reproduced by the reproduction device f1 into sound waves, a '4 person listener, es, e are
the ears of the upper listener 4, respectively; The sound wave radiated from '3' is listened to by
the ear 6.6 of the listener 4, and the listener 4 invites a part of the listener 4, for example, point
AK sound. FIG. 2 shows the same part of FIG. 1 with the same part pro- duced in the reproduction
unit [1] and heard in the bed room 7 as shown in FIG. When listening to Tsudhon 7 聴, recipient i
4 is a point within the cage of recipient S 4. For example, a stone that recognizes a sound image
at point B, and in FIG. 2, 8.9 are electroacoustic transducers at the left and right of the
headphone 7 respectively. ′。 As shown in the fgR diagram, the present invention can recognize
a sound image outside the head of the listener 4 in the same manner as the Ska beak hearing
shown in the # '1 even when listening with the headphone a. , M4)) 1 ′ ah, 2 竺 3 shows
the approximate EndPage: 1 in the case of the speaker reception t + ゐ in the room 10. The
sound radiated from the speaker a is referred to as a sound line of many sound paths C and
below as shown in FIG. 3) 1) For example, to the left and right ears 6, 6 of the listener 4 through
the sound lines 11.12.13. Reach. Note that the sound @ 11 is a path where the sound emitted
from the speaker 3 reaches the ear 6 ° 6 most quickly, that is, the path of the direct sound. A
sound line 12.13 is a path that the sound emitted from the speaker 3 is reflected by the wall of
the room 1o and the like to reach the ear 6.6, ie, a path of one indirect sound, and this indirect
sound is delayed behind the direct sound and the ear Reaching 6.6 and 4K. Every time it is
reflected by the wall @, it is phase shifted. And the indirect sound reaching the left and right ears
due to the acoustic asymmetry of wealth is often a stone that is out of phase. However, in the
headphone listening shown in FIG. 2, the indirect sound in the above-mentioned speaker listening
is not stable, so that in the headphone listening, the sound gII is localized in the head. In the
present invention, in view of the above point, a signal C corresponding to an indirect sound in the
above-mentioned speaker receiving lIK is referred to as an indirect sound signal) and a indirect
sound signal is a direct sound signal c to a direct sound. Named K) in addition.
It is an ambitious one that tries to make the sound note 9th out of the head by the deaf yK
application. An embodiment of the present invention will be described below with reference to
FIG. FIG. 4 shows the headphone device of the present invention for playing back a program
source containing a monaural signal and listening to the headphone, and in FIG. 4, 14 is a
reproduced nine monaural signal applied and a stone input terminal , 16.15 'are delay circuits,
16.16' are different frequency-phase characteristics, 1-Zi phase shifter, 17 DEG 17 'is an adder,
and 151.18' is also an adder. As shown in FIG. 4, the signal applied to the input terminal 14 is
divided into two at point a to become two N onomatopoeic signals. Each reaches an adder
151.18 '. -Also, part of the direct signal is branched at points b, b '. Delay circuit 15. The stone is
applied to the adder 18.18 'via LJ5', and the output of the delay circuit 18.16 'is partially divided
into the adder 17.17' via the phase shifters 16 □, 16 '! : A signal obtained through the delay
circuit 1st, 1g ', and the phase shifter 16.16' as in the case of nine or more is a signal (indirect
sound signal) corresponding to an indirect sound in the speaker listening Yes, this indirect sound
signal and the direct sound signal obtained through the route 14 → a → b or 14 → a → b 'are
added 311! They are respectively added at 1 * and 11f, converted into sound by the
electroacoustic transducer 8.9 of the headphone 7, and heard by the left and right ears 6.6. In
the case of 2-channel stereo, in the case of 2-channel stereo, the above example of the right is an
example of a bite-nall, which is applied to the input terminal 19.19 'in water as shown in FIG.
Similar to the previous embodiment, the delay circuit IBS 115 '615 q * 155 "and the frequencyphase characteristic difference 711 穆 phase shifters 16e 16', 16". If the indirect sound signal is
added via 16 ′ ′ <b, this indirect sound signal and the signal directly f # / c phase are added
and the electroacoustic transducers a on the left and right of the headphone 7 are applied, tLK It
is a thing. In Fig. 6, 17.1-17 ", 1 te", 1s, 1m ', 1m', 1a "and 20 ° 20 'are adders, respectively, in
the case of To, 11 ° 6 · 1, 4 channels Even in the same way as the example of the above right
hand, it can be centralized. Also in the above embodiment, as in the case of -bh '& 1 in the
present invention, the speaker receiver 1iK has a spike signal corresponding to an inter-stone
junction via a simple circuit, a direct sound signal corresponding to this indirect sound signal In
the case of headphone listening, as in the case of speaker listening, the sound 定位 is localized
out of the head and fatigue feeling peculiar to headphone listening is distracted and it has an
4. Brief description of the drawings. FIG. 1 is a schematic view showing the state of hearing a
slaker, FIG. 2 is a schematic view showing a headphone listening condition II, and FIG. 3 is a view
showing a path of sound in the speaker listening. The figure is a plotter diagram of the
headphone device in one embodiment of the present invention, and FIG. 5 is a diagram of
another embodiment Pw. 4- ·················································································································· Zero:響 1,
1H1 IB ', 1 etv, 1g ′ ′ 9 ··············································· Phase shift s% 17 * 17 ′, 17 ′ ′ , 1?
"EndPage: 27'18.18 ', 111q, 18 #', 20.20 '... ..... Adder. Name of agent Attorney Nakao et al. 1
person Japanese Patent Application Laid-Open No. 52-11002 (3) 1 FIG. 1 FIG. 2 FIG. 3 FIG. 4 FIG.
964 ff 'EndPage: 3 FIG. (2) Agent-只-EndPage: 4