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Non-microphone voice transmission device

A voice transmission and microphone technology, applied in sensors, sensor parts, transducer circuits, etc., can solve problems such as low signal-to-noise ratio, and achieve the effects of low distortion, good confidentiality, and good radiation resistance.

Inactive Publication Date: 2007-10-31
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Generally, the microphone is 30-50 cm away from the sound source, and the signal-to-noise ratio is too small to be used, so the presence of the microphone is sometimes inconvenient

Method used

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  • Non-microphone voice transmission device

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0033] Example 1: Consists of a 3×3 fiber coupler, and its structure is shown in Figure 2.

[0034] The light emitted by the stable light source 1 is connected through the jumper FC / PC and enters the 3×3 fiber coupler 2. After being split, the light from port 7 of the coupler passes through the fiber delay line 3, and then passes through the sound receiving device 4 The hour hand is transmitted to port 8. The light of the port 8 first passes through the sound receiving device 4 and then is transmitted to the port 7 through the optical fiber delay line 3 counterclockwise. The two light beams form an optical signal carrying the physical characteristics of the acoustic receiving device in the 3×3 fiber coupler 2, which is received by the detectors 5 and 6. By inverting the interference signal, the physical characteristics of the acoustic receiving device 4 are finally obtained.

example 2

[0035] Example 2: Consists of 2×2 fiber couplers, and its structure is shown in Figure 3.

[0036] The light emitted by the stable light source 1 passes through the 2×2 fiber coupler 2, and after being split, the light from port 7 passes through the fiber delay line 3 and then passes through the sound receiving device 4 and transmits clockwise to port 8, and the light from port 8 first passes through the sound receiving device After 4, it is transmitted counterclockwise to port 7 through the optical fiber delay line 3. The two light beams form an optical signal carrying the physical characteristics of the acoustic receiving device in the 2×2 fiber coupler 2 and are received by the detector 5. By inverting the interference signal, the physical characteristics of the acoustic receiving device 4 are finally obtained.

[0037] The working principles of the two structures of Example 1 and Example 2 are the same, except that in the structure shown in Example 1 (Figure 2), there are two ...

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Abstract

The invention belongs to information technology field, which concretely is a voice transmitting device formed with fiber passive device. It can replace the normal microphone with voice signal to modulate light signal. The character is that the sensibility is high, it is stable, high confidentiality, won't be affected by electromagnetism radiation. It can be applied to class teaching, meeting, broadcasting, performing and micro-voice detecting, civil occasion and military occasion.

Description

Technical field [0001] The invention belongs to the field of voice signal transmission, and specifically relates to a microphoneless voice transmission device. technical background [0002] In 1875, Alexander Bell invented the telephone, which realized for the first time analog communication using electricity to transmit voice information. In the communication process, the current in the wire changes continuously with the strength and speed of the sound, that is, the change of the current intensity is used to simulate the change of the sound strength. [0003] The working process of the telephone can be briefly described as follows: the sound waves of a person’s speech make the vibrating membrane in the microphone vibrate, causing the magnetic field in the nearby coil to change, and then causing the current to change; this signal-carrying current is transmitted through the wire to the receiver The magnetic field changes in the coil of the receiver, and then the film in the receiv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R23/00H04R3/00
Inventor 华中一贾波
Owner FUDAN UNIV
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