JPH0444443A - telephone receiver - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a high-noise communication device, and more specifically, a high-noise communication device for clearly listening to transmissions from a telephone under high-noise conditions. It is related to.

[Conventional technology] Conventionally, construction sites, offices near airports, ship engine rooms,
Background of the Invention When listening to calls from a telephone in a car, a station, etc., the clarity of listening is hindered by ambient noise.

This is because when comparing spectra of various external noises and voice spectra, the noise spectra and voice spectra are extremely similar. Therefore, in a noisy place, it becomes difficult to hear the voice due to the masking effect of the noise.

[Problem to be solved by the invention]

Traditionally, telephone booths have been used as a countermeasure for listening to telephone calls in high-noise environments, but this is not always possible due to problems such as the inability to secure an installation location and cost.

Furthermore, the technology disclosed in Japanese Utility Model Publication No. 61-43348 is for a transmitting device under high noise conditions, and is not a technology applicable to listening to telephone calls under high noise conditions.

This invention was made to solve the above problem, and it is possible to use a simple and inexpensive device to block external noise and improve the clarity of voice audibility when listening to a telephone in a place where there is a lot of external noise. The purpose of the present invention is to obtain a high-noise communication device that is capable of communicating under high noise conditions.

[Means to solve the problem]

In the high-noise communication device according to the present invention, a coil for generating an audio magnetic field is provided in the handset of a telephone, an induction coil receives the audio magnetic field and converts it into an electric signal, and the electric signal from the induction coil is It comprises an amplifier for amplification and a separate handset for converting the output of this amplifier into an audio signal, the further handset being provided with a sound-insulating element for blocking extraneous noise.

C Effect] In the present invention, telephone listening is performed by bringing the receiver of the telephone close to the induction coil. At this time, the sound insulation element blocks out external noise.

〔Example〕

FIGS. 1 and 2 show an embodiment of the present invention, and show a telephone (
A first receiver (2) provided in 1) is provided with a coil that generates an audio magnetic field. On the other hand, an induction coil (3) that captures the audio magnetic field, an amplifier (4) that amplifies the electrical signal from this induction coil, and this amplifier (4).
A second receiver (5) that converts the output of the receiver into an audio signal is housed in a sound insulating cup (8) together with a power battery (7). (6) is a volume adjuster, and (9) is an earmuff member.

With the above configuration, the sound insulating cup (8) is worn on the head, and the first receiver (2) is brought close to the induction coil (3).

The audio magnetic field proportional to the audio induced from the first handset (2) is caught by the induction coil (3) and converted into an electrical signal. This electrical signal is amplified by an amplifier (4), further converted into an audio signal by a second receiver (5), and adjusted by a volume controller (6) to a volume that allows appropriate audio listening. The sound insulating cup (8), which is a sound insulating element, blocks out external noise, and although the degree of this depends on the condition of the earmuff member (9), a sound insulating effect of about 30 dB can be obtained in the conversation sound frequency region. In this way, telephone calls can be heard clearly even under high noise conditions.

In the above embodiment, the sound insulation cup (8) was used as the sound insulation element, but there are several other sound insulation elements that can be used as the sound insulation element.

Figure 3 shows the induction coil (3), amplifier (4), and
The second telephone receiver (5) and the battery 7 (the above constitute the electric circuit portion) are housed in the insert-shaped case 00). This insert-shaped case 00) is manufactured in a shape that fits suitably into the external auditory canal 01), resulting in approximately 20 dB in the conversational sound frequency range.
can be shielded. However, if the conversation intelligibility deteriorates during use, you may want to cover one ear by holding it with your finger.

In FIG. 4, the electric circuit part is housed in a behind-the-ear type case Oz which is a sound insulating element, and the audio signal output from the second receiver (5) is sent to the external auditory canal through the tube (13) and the ear plug 04. In this case as well, a sound insulation effect of about 20 dB can be obtained.

Furthermore, in the embodiment shown in FIG. 5, the electric circuit part is housed in a box-shaped case 05), and only the second receiver is used as a receiver 06) having an earplug side that serves as a sound insulating element.
It is led out to the outside through the ear canal, and is used by inserting an ear plug into the ear canal. The sound insulation effect in this case was also about 20 dB.

[Effects of the Invention] As is clear from the above description, the present invention includes an induction coil that catches the audio magnetic field generated from the first handset of a telephone, an amplifier that amplifies the output of the induction coil, and an output from the amplifier. By including a second handset that converts signals into voice and housing at least the second handset in a sound insulating element, it is effective to significantly improve the intelligibility of telephone hearing in places with large external noises.

[Brief explanation of the drawing]

Fig. 1 is a wiring diagram of one embodiment of the present invention, Fig. 2 is a partially cutaway perspective view, Fig. 3 is a schematic side view of main parts of another embodiment, and Fig. 4 is a still further embodiment. A schematic side view of the main parts of the 5th
The figure is a schematic front view of main parts of another embodiment. (1)...telephone, (2)...first receiver, (3
)...Induction coil, (4)...Amplifier, (5)...
・Second receiver, (8)...Sound insulation cup (sound insulation element)
.

Claims (1)

[Claims] a first handset that is incorporated into a telephone and is provided with a coil that generates an audio magnetic field; an induction coil that converts the audio magnetic field into an electrical signal; an amplifier that amplifies the electrical signal; and an output of the amplifier that converts the output of the amplifier into an audio signal. A high-noise communication device comprising: a second handset for conversion; and a sound insulation element provided on the second handset for shielding external noise.