JPH10234094

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DESCRIPTION JPH10234094
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speaker device used as a means for compensating for the deterioration in hearing ability of a
deaf person such as an elderly person in combination with a television receiver (hereinafter
referred to as a television).
[0002]
2. Description of the Related Art In recent years, the aging of society has progressed rapidly, but
the deaf people such as the elderly generally lose their hearing ability, so they can hear clearly
unless the volume is increased when watching television etc. Absent. Or even when watching TV
with a family of a hearing person, Fig. 5 (A graph of the decrease in high-pass sensitivity in
hearing by age (Makita ed. "Contemporary acoustics" (Ohm Corporation, p. 48, 1978)). As can be
seen from the reference), compared with the average hearing person, the high frequency level is
lower by 10 to 20 dB in average for elderly people, so to make it easy to hear, rely on increasing
the volume or using an earphone etc. I needed it.
[0003]
As described above, when the volume is increased to a level that makes it easy for the elderly to
hear, the sound will spread with omnidirectionality if it is a general built-in television speaker, so
For a hearing person who is viewing and listening, as will be understood from FIG. 5, the user
hears a sound that is 10 to 20 dB larger than the appropriate level, and the volume becomes too
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loud.
[0004]
Also, when the built-in speaker is not turned off, that is, only the deaf person uses the earphone
while the built-in speaker and the earphone can both be sounded at the same time, and the
general hearing person views at the proper volume with the built-in speaker. Although the sound
volume is appropriate and comfortable for the hearing person, it is often the case that the deaf
person feels alienated because he feels closed by wearing the earphone and is not preferred.
[0005]
As described above, when a hearing impaired person and a general hearing person watch and
enjoy television etc. at the same time, it is difficult for both parties to be satisfied and watch
comfortably because of hearing deterioration.
[0006]
The present invention solves the above-mentioned problems, and provides a speaker device
capable of satisfying natural watching with each other without using an earphone etc. when
elderly deaf and a general hearing person watch simultaneously. It is a thing.
[0007]
SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a speaker
apparatus according to the present invention comprises a first amplifier to which at least an
audio signal is input and a first speaker to which the first amplifier output is input. And a driving
amplifier to which the audio signal having a sound pressure frequency characteristic having an
increased level of a high range of about 1 KHz or more is input, and a directional speaker to
which the driving amplifier output is input A person who is deaf can hear the corrected
reproduced sound from the directional speaker, and both the hearing person and the deaf person
can hear the satisfactory reproduced sound.
[0008]
According to the first aspect of the present invention, there is provided a first amplifier to which
at least an audio signal is input, a first speaker to which the first amplifier output is input, and a
voltage of approximately 1 KHz. It consists of a drive amplifier to which the above-mentioned
audio signal having sound pressure frequency characteristics with the above-mentioned high
sound range level increased and a directional speaker to which this drive amplifier output is
input The hearing person hears the reproduction sound corrected by the directional speaker
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directed to the deaf person, and the hearing person hears the normal reproduction sound from
the first speaker, and the hearing sound of both the hearing person and the deaf person can be
satisfied You can listen to
[0009]
The invention according to claim 2 of the present invention is a sound pressure frequency
characteristic which is installed in the vicinity of an audiovisual apparatus having at least an
amplifier such as a television receiver or the like and a speaker and increases the level of a high
range of about 1 KHz or more. Since it comprises the drive amplifier to which the audio signal of
the above-mentioned audiovisual apparatus is input and the directional speaker to which the
output of this drive amplifier is input, the speaker apparatus of the present invention is simply
added to the existing audiovisual apparatus. Both the hearing and the deaf can hear a satisfactory
reproduced sound.
[0010]
The invention according to claim 3 of the present invention is the directional loudspeaker
according to claim 1 or 2 as a rotatable directional loudspeaker, and correction of the directional
loudspeaker according to the position of the person who is deaf The rotation direction of the
reproduced sound can be changed easily and arbitrarily.
[0011]
The invention according to claim 4 of the present invention is that the directivity in the vertical
direction of the directional speaker according to claim 1 or claim 2 or 3 is set wider than the
directivity in the horizontal direction, and listening It is intended to facilitate the adjustment of
the direction of the directional speaker with respect to the position in the height direction of the
person (height height etc.).
[0012]
The invention according to claim 5 of the present invention is a drive amplifier according to
claim 1 or claim 2 or claim 3 or claim 4 in which a delay circuit is incorporated. The sense of
depth and sense of expansion can be obtained even with the corrected reproduced sound of the
above.
[0013]
The invention according to the sixth aspect of the present invention is that the drive amplifier
according to the first aspect, the second aspect, the third aspect, the fourth aspect, or the fifth
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aspect is provided with an output variable means. The output of the directional speaker can be
adjusted according to the degree of hearing loss.
[0014]
The invention according to claim 7 of the present invention is the drive amplifier according to
claim 1 or claim 2 or claim 3 or claim 4 or claim 5 or claim 6 for varying the sound pressure
frequency characteristic. The listener can adjust the sound pressure frequency characteristic that
the listener can hear most and output it from the directional speaker, so that the listener can
enjoy comfortable reproduction sound.
[0015]
Hereinafter, an embodiment of a speaker device according to the present invention will be
described with reference to FIGS. 1 to 4.
[0016]
FIG. 1 is a perspective view of an embodiment of a speaker device according to the present
invention, FIG. 2 is an explanatory view of the same rotation state, and FIG. 3 is a directivity
characteristic diagram at each rotation angle of FIG.
According to the figure, 1 is a directional speaker, 2 is a drive amplifier with a high-frequency
correction circuit whose output for amplifying an audio frequency of 1 KHz or more is connected
to the directional speaker 1 and a normal first amplifier And a main body incorporating a first
normal speaker connected to the first normal amplifier.
[0017]
In addition, 3 is a knob for adjusting the output of the drive amplifier with high-frequency
correction circuit or a normal first amplifier, and 4 is a rotation shaft serving as a rotation means
of the directional speaker 1.
[0018]
Next, the operation of the above speaker device will be described. An audio signal input from the
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outside is amplified by the normal first amplifier and emitted from the normal first speaker.
Further, the audio signal is amplified by high-frequency correction so as to amplify an audio
frequency of 1 KHz or more larger than the output of the first amplifier by the driving amplifier
with high-frequency correction circuit so as to compensate for the hearing of elderly people.
Sound is emitted from the directional speaker 1.
[0019]
The directional speaker 1 is appropriately rotated and adjusted by the rotational shaft 4 as in the
rotational positions 21 to 23.
[0020]
FIG. 3 shows directivity characteristics, and shows sound pressure frequency characteristics at a
position 1 m from the rotation axis 4 when the front axis of the rotation axis 4 is rotated at 30 °
and 60 ° with 0 ° on the front axis. For example, a 2 KHz sound in the direction of 30 °
attenuates by about 15 dB, and the high-frequency-corrected sound for the deaf person is also
attenuated to a negligible level by only slightly changing the position of the hearing person. You
can listen to the sound you can play.
[0021]
Further, the directivity in the vertical direction of the directional speaker 1 is set wider than in
the horizontal direction.
As a result, even if the position in the height direction of the listener varies somewhat,
adjustment of the directional speaker in the height direction becomes unnecessary, and position
adjustment of the directional speaker 1 is extremely easy.
[0022]
If the normal first amplifier built in the main body 2 can be amplified in the low frequency range
(for example, about 100 Hz) and the normal first speaker can be reproduced in low frequency
only, the speaker apparatus is only for the hearing impaired person It is possible to provide a
speaker device more suitable for reproduction of music or the like as a speaker device even for a
hearing person.
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[0023]
In addition, by providing a known delay circuit in the drive amplifier with high-frequency
correction circuit built into the main body 2, even if the directional speaker 1 is limited to
monaural use by only one, it is obtained by the delay circuit. It is also possible to provide a
speaker device capable of obtaining a sense of sound spread and a sense of depth by mixing
audio signals.
[0024]
Further, if the drive amplifier with high-frequency correction circuit built in the main body 2 is
provided with output variable means and sound pressure frequency characteristic variable means
is adjusted, it is adjusted to the sound pressure frequency characteristic that the listener can hear
most Since the directional speaker 1 can output the sound, the listener can enjoy more
comfortable reproduced sound.
[0025]
FIG. 4 shows an application development example of the above embodiment, wherein 31 is a
television receiver, and 32 is a high band connected to an audio output terminal (for example, an
earphone terminal etc.-not shown) of the television receiver 31. A speaker device is composed of
a main body having a drive amplifier with a correction circuit and a directional speaker, 35
indicates a range of signal sound emitted with narrow directivity from the speaker device 32, and
36 indicates the range of the television receiver 31. The range of the signal sound emitted with
wide directivity is shown.
[0026]
Note that 33 indicates a hearing person and 34 indicates a deaf person such as an elderly person.
According to the above-mentioned configuration, the hearing person 33 hears the reproduction
sound out of the range of the reproduction sound from the speaker device 32 (the reproduction
sound which is extremely attenuated is heard, but the sound is attenuated to an unnoticeable
extent.
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The hearing impaired person 34 can adjust the sound volume or sound pressure frequency
characteristics as described above of the speaker device 32 appropriately to view the program
comfortably.
At this time, if the sound emission direction, output (volume) and sound pressure frequency
characteristics of the directional speaker are adjusted at the listening position by a known remote
control device, the adjustment accuracy and complexity will be released. .
[0027]
Although the television receiver 31 has been described in the above-mentioned application and
development example, it may be stereo or the like, and can be used in any of audiovisual
equipment.
[0028]
As described above, the present invention uses the driving amplifier having the sound pressure
frequency characteristic with the increased level of the high frequency range, the directional
speaker, the normal amplifier and the normal speaker. The deaf person can hear the corrected
reproduced sound from the directional speaker, and both the hearing person and the deaf person
can hear the satisfactory reproduced sound.
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