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JPS5544289

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DESCRIPTION JPS5544289
1 и и и t7-1 specification 1, title of the invention
Headphone device
13. Detailed description of the invention The present invention relates to a headphone device,
and provides a headphone device capable of reproducing natural sensation similar to a speaker
receiver. FIG. 1 shows the first of the speaker hearing letters. In FIG. 1, 1 is a dummy head, 292
'is an ear of this dummy head 1, and this ear 2. A microphone is equipped in i. There is a 3,3 '. It
is a speaker placed in the direction 300 from the front of the dummy head 1, and this speaker
3.3 'has a flat frequency frequency characteristic. FIG. 2 shows a listening state by the
headphone device of the present invention. Reference numeral 1 denotes a dummy head, and 2t2
'denotes an ear of the dummy lead 1. A sounding unit 4) 4' is disposed near the ear 2, 2 '. If the
signal S from 1 sound generation unit 4 to ear 2 in headphone listening in FIG. 2 is equal to the
signal S1 from speaker 3 to ear 2 in speaker listening shown in FIG. 1, even in headphone
listening in FIG. The same realism as listening to a speaker can be obtained. However, in terms of
psychoacoustics, there is no requirement that both signals coincide with each other, and as
shown in FIG. 3, there is a discrimination limit regarding the levels, S, and S. If the difference
between the two is the discrimination level of the eye (up to 2 dB) K, the headphone listener can
obtain the same natural sense of presence as the speaker listening. That is, it is possible to
reproduce the same psychoacoustic phenomenon as listening with a flat speaker having a flat
frequency characteristic while the sound generation units 4 and 4 'are present near the ear. In
addition, FIG. 3 shows the frequency characteristic of the discrimination limit of the loudness
level of sound, and Xl is 30 dB and X. EndPage: 13-shows 60 dB, and X3 shows 80 dB sensory
level. The present invention provides a headphone it in which the special condition of the
difference between WcjSt and 82 is within the discrimination limit. In order to make a
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discrimination domestically, it is necessary to fully consider the sound generation unit caliber of
the pinnacle that affects the pinna and the positional relationship between this sound generation
unit and the ear. According to the results of the present inventors, in order to make it within the
pre-discrimination limit, 1 sounding unit as shown in FIG. 2; 4 'and the distance between the ear
entrance! and the center tfil of the sound generation unit 4, 4 'is on the horizontal plane as the
origin of the in-ear location, and the center @l is between 0 ░ to 600 with respect to the 1E
plane direction. It must be at an angle ? and furthermore that the sound producing units 4, 4
'are supported by a support device which is less affected by reflections.
FIG. 4 shows an example in which the difference between S ? and 82 is large. 6 shows an
example 2 of the headphone device in the embodiment 1 of the present invention. In FIG. 6, 5 is
an annular ear ratio, 6 is a sounding unit, and 7 is a porous cover. In this example, the sound
emitted from 1 sounding unit 6 is reflected by the cover, resulting in a resonance phenomenon
being drawn. As shown in FIG. 7, the discriminatory eye is not inside. Figures 8-11 show an
embodiment of the present invention. In FIG. 8, 8 is a head band, 9 (one annular ear rate attached
to the end of the head band 8). 1 o is a thin rod fixed at one end to the ear ratio 9. The sounding
unit 4 is fixed to the other end of the rod 1o. In FIG. 9, 11 is a wire bent in a U-shape, and one
end of the wire 11 is fixed to the ear ratio 9 and the sounding unit 4 is fixed to the other end of
the wire 11 It is. FIG. 10 shows an actual t @@ example in which the influence of the reflected
sound is eliminated by attaching the sound radiation port 2+ of the sound generation unit 4 of
the embodiment shown in FIG. 9 and the sound absorbing material 12. In FIG. 11, by attaching
the sound generation unit 4 to the ear ratio 9 through the wire mesh 13, the number of
reflections is reduced and the operation is stopped. The present invention has the abovedescribed structure, and according to the present invention, it has the advantage that natural
sensation similar to that of the speaker hearing can be obtained relative to the conventional
example, and in the case of pinaural source listening. It has the advantage of being able to
faithfully reproduce the realism of the original sound field.
4. Brief description of the drawings. FIG. 1 is an analysis diagram showing the speaker listening
condition, FIG. 2 is a diagram showing a listening condition by the headphone device in one
embodiment of the present invention, and FIG. FIG. 4 is a frequency characteristic diagram of the
difference between speaker reproduction and conventional headphone reproduction. Fig. 5 is a
special number diagram of the difference between headphone reproduction and speaker
reproduction according to the present invention, Fig. 6 is a cross-sectional view of a listening
state of a conventional headphone apparatus, and Fig. 7 is headphone reproduction of Fig. FIG. 8
to FIG. 11 are perspective views of the main part of the headphone device according to the
embodiment of the present invention. 1 иииииии Dummy head, 2.2 ? иииииииии Ear, 3.3 ? ? 6 и Head
band, 9 ииииии Ear M, 10 иии Old bar иии 11 иииииии Wire, 12 иииииии Sound absorbing material, 13 ииииииии Wire
mesh. Name of agent Attorney Nakao Toshio is one person EndPage: 2 Figure 3 to Figure 4)! J5
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'47 Figure EndPage: ?
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