JPS6143348Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a high-noise speech transmitting device using glasses that provides good speech intelligibility even in places with high noise levels.

Traditionally, when transmitting calls in places with relatively high noise levels, such as machine shops, pilot cockpits, or vehicle driver's seats, nearby microphones, pharyngeal microphones, and ear canal microphones have been used because surrounding noise impairs speech intelligibility. etc. were used. However, proximity microphones do not have a large speech-to-noise ratio; pharyngeal microphones detect signals from the pharynx, which emphasizes the vocal cords' original sound, resulting in extremely poor speech intelligibility; Each had their own drawbacks, such as poor sensitivity because they detected vibration waves and complicated circuit configurations. Furthermore, common to all three of the above, there are difficulties in installation, such as how to install the transducer and how to wire the lead wires connected to the circuit part. was the problem.

The present invention eliminates the above-mentioned drawbacks and provides a high-noise transmitting device that has good speech intelligibility and is easy to wear.

Hereinafter, one embodiment of the present invention will be explained according to the drawings. In Figs. 1 and 2, 1 is a pad of glasses, which penetrates from the inner surface, that is, the side that contacts the nose, to the outer surface, and is attached to the nose. Then, a hole of an appropriate size to be sealed is formed to form a space 1a, and an ultra-small microphone 2 is fixed with an adhesive 3 or the like on the outer surface of the pad 1 so as to face the space 1a. . 4 is an attachment member for attaching the pad 1 to the frame 5 of the glasses. Reference numeral 6 denotes a pair of eyeglasses having a storage part 6a formed at the tip thereof, and in the storage part 6a there is installed an electric circuit part shown in FIG. a filter 9 for blocking frequencies within the range, an FM transmitter 10 for converting the output voltage from the filter 9 into FM radio waves and transmitting them to distant locations within a predetermined range, an antenna 11, and a battery for operating the above-mentioned electric circuit. 12, and is connected to the ultra-small microphone 2 via a lead wire 7 attached and fixed along the frame 5 and the temple 6.

Next, the operation will be explained. When the user puts on the glasses, the pad 1 comes into contact with the nose and the space 1a is sealed. When vocalization is performed in this sealed state, the audio signal vibrates the skin of the nose and the volume of the space 1a changes. This variation in volume is detected by an ultra-small microphone 2 and converted into an electrical signal. The converted electrical signal is input to a preamplifier 8, voltage amplified, and input to a filter 9. In this case, since the space 1a is in a sealed state, external noise is less likely to enter, and the S/N ratio is improved. The output of filter 9 is the FM transmitter 1.
0, converted to FM signal and sent to antenna 1.
1 is output as FM radio waves. outputted
The FM radio waves are received by an FM receiver at a predetermined location and are listened to. In the filter 9, since the audio signal vibrates the skin of the nose through the nasal cavity, the frequency characteristics change within the nasal cavity, and the low range is emphasized and the vowels |a|, |
Since i|, |u|, |e|, |o|, etc. are nasalized, speech intelligibility is improved by cutting off low frequencies to compensate for this. Figure 4 shows the audio signal |a|, |
The frequency analysis results of i|, |u|, |e|, |o| are shown, and the vertical axis shows the response (10 dB/
div), the horizontal axis represents the frequency (kHz), the solid curve represents the frequency analysis result of the audio signal in the standard state, and the dotted curve represents the frequency analysis result of the audio signal before passing through the filter 9 in the embodiment of the present invention. ing. The filter 9 acts to bring the low frequency portion of the point curve closer to the real curve.

As mentioned above, the present invention is configured so that the glasses are equipped with all the functional elements including the power supply battery, so they are easy to wear and can be worn anywhere within the range where FM radio waves can be received. It is possible to send calls even under high-noise conditions, and has good clarity in practical use.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of an embodiment of the present invention, Fig. 2 is a partially enlarged side cross-sectional view, Fig. 3 is an electric circuit configuration diagram, and Fig. 4 is a characteristic showing frequency analysis results during vowel pronunciation. Line diagram. 1: pad, 1a: space, 2: ultra-small microphone, 5: frame, 6: crane, 6a: storage, 7:
Lead wire, 8: Preamplifier, 9: Filter, 1
0: FM transmitter, 12: Power battery.

Claims (1)

[Scope of utility model registration request] A suitable hole is formed by penetrating the pad of the glasses from the inside to the outer surface to form a space, and an ultra-small microphone is held in close contact with the outer surface facing the space, and is attached to the temple of the glasses. A preamplifier connected to the ultra-small microphone, an electric circuit consisting of a low-frequency cutoff filter, an FM transmitter, and an antenna are successively connected and housed in the formed housing, and a battery for operating the electric circuit is also housed. High-noise transmitter that is stored.