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JP3021076

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DESCRIPTION JP3021076
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
speech apparatus used in a high noise area, and more particularly to a headset worn by a caller.
[0002]
2. Description of the Related Art In a high noise atmosphere, the hearing is paralyzed, resulting in
temporary hearing loss. In this state, voice calls can not be made. Also, even if ear protection is
performed using ear protection such as earmuffs, if the noise level is much higher than that of
voice, the noise will wipe out the voice and can not talk.
[0003]
Especially in power plants etc., there are many equipments that generate high noise, such as
large-sized turbines, diesel engines, pumps, fans, etc., and the installation place is divided by
concrete walls. Noise is concentrated in a narrow space. In this kind of environment work,
communication between workers and protection from noise are also necessary from the aspect of
improving work efficiency and safety.
[0004]
01-05-2019
1
When protecting the ear from high levels of noise, the usual earmuffs do not provide sufficient
sound insulation. For this reason, it is necessary to use an earmuff with ANC (abbreviation for
Action Noise Canceller, which is an apparatus for electrically canceling noise in the earmuff), but
the earmuff with ANC regards all external noise as noise, and the opposite phase It can not be
used as a handset of a communication device because it cancels out by adding it.
[0005]
[0005] To protect the ears of people working in high noise places, to make calls with each other
and with other places possible, contributing to the improvement of safety and work efficiency
Provide a capable headset.
[0006]
SUMMARY OF THE INVENTION In a headset having a pair of earmuffs with an active noise
canceller, one earmuff 1a is for receiving communication from another radio, and the other
earmuff 1b is an active noise canceller. 3b was connected to the throat microphone 6 and the
sound collection microphone 2b via the multiplier 5, and the actuator 4b was provided with the
function of the handset of the telephone set.
[0007]
DETAILED DESCRIPTION OF THE INVENTION In summary, the present invention protects the ear
from high levels of noise, and superimposes the audio signal from the intercom on the ANCequipped earmuff's actuator and allows Is made possible.
With regard to microphones that convert normal air vibration into an electrical signal, the
influence of air vibration due to noise is greater and voice can not be transmitted, so it does not
respond to air vibration and so does the throat directly. By making use of a throat type
microphone that converts the vibration of the speaker into an electric signal, clear speech can be
made even in a high noise area.
[0008]
01-05-2019
2
FIG. 1 shows a headset according to the present invention.
1はイヤマフである。 One earmuff 1a incorporates a sound collecting microphone 2a, an ANC
processor 3a and an actuator 4a. The other earmuff 1b is one of the non-linear operators of the
multiplier analog computer in addition to the sound collecting microphone 2b, the ANC
processor 3b and the actuator 4b, and the output voltage is two input voltages x and y (A device
that is the product of 6 is a throat microphone. An audio out terminal is connected to the ANC
processor 3a on the side of the earmuff 1a, and a mic.in terminal is connected to the multiplier 5
built in the side of the throat microphone 6 and the other side of the earmuff 1b. A battery 8 is
connected to the ANC processor 3a on one earmuff 1a side and the multiplier 5 on the other
earmuff 1b side.
[0009]
Operation: The voice heard by the worker is picked up by the throat microphone 6 (FIG. 3) and
transmitted from the wireless handset 7. Conversely, the voice received from the wireless
handset 7 (FIG. 2) is muted by the ANC processor 3a from the actuator 4a in the earmuff 1a on
one side and can be heard by the operator from the actuator 4a. At this time, the voice of the
worker itself is fed back, and is synthesized with the sound of the sound collection microphone
2b by the multiplier 5 so as not to affect the ANC processor 3b. The multiplier 5 delays the phase
of the audio signal from the throat microphone 6 and synthesizes it with the sound from the
sound collection microphone 2b of the ANC processor 3b. Therefore, the actuator 4b is only
muffled and no sound can be heard.
[0010]
According to the present invention, in a pair of earmuffs with ANC, one earmuff is used for
receiving communication from another radio, and the other earmuff's ANC is connected via a
multiplier to a throat microphone and a sound collection microphone. And the actuator had the
function of the handset of the handset. In this way, it became possible to make a call by
weighting the voice signal to the ANC-equipped earmuff actuator. Moreover, since the throat type
microphone which converts the vibration of the throat to an electric signal was used, the clear
telephone call became possible also in a high noise place. In this way, protecting the ears of
people working in a high noise location and making it possible to talk with each other and talk
with other places greatly contributes to the improvement of safety and work efficiency.
01-05-2019
3
[0011]
Brief description of the drawings
[0012]
Figure 1 Headset of the invention.
[0013]
2 is a functional explanatory diagram of the flow of voice on the receiving side.
[0014]
3 is a functional explanatory diagram of the flow of voice on the transmission side.
[0015]
Explanation of sign
[0016]
1 (1a, 1b) Ieyamafu 2a, 2b Sound collection microphone 3a, 3b ANC processor 4a, 4b Activator 5
Multiplier 6 Throat microphone 7 Wireless handset 8 Battery-
01-05-2019
4
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