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Oscillation echo canceller system

An echo cancellation, ontology technology, applied in earpiece/headphone accessories, transducer acoustic response prevention, electrical components, etc., can solve problems such as oscillation phenomenon and echo

Inactive Publication Date: 2007-03-21
NAP ENTERPRISE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, in the case of the two-way communication described above, a loop including sound waves propagating in the space of the transmitters of the two communication devices and electrically combined is formed, resulting in oscillation and echo phenomena.

Method used

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Examples

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Embodiment Construction

[0011] An embodiment of the present invention will be described below with reference to the drawings. 1 is an oscillation-echo cancellation system, which has an earphone microphone 2 as its main component. The earphone microphone 2 has a hollow body 5 having an insertion portion 4 with an opening 3 formed to fit the size of an ear hole. The main body 5 is made of synthetic resin, has a substantially circular cylindrical shape viewed from the side, has no opening except the opening 3 in the insertion portion 4, and has a closed hollow inside. The insertion part 4 is provided to protrude from the side central part of the main body 5, and the front end is fitted with an earplug 6 made of elastic material such as rubber, which can closely contact the ear hole (external auditory canal) no matter what size. The main body 5, the half part 5a on the side of the earplug 6 is matched with the half part 5b on the opposite side, and a ring-shaped member 7 is interposed on the outer perip...

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PUM

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Abstract

An oscillation echo canceller system (1), comprising a hollow body (5) having an insert part (4) with an opening (3) formed in a size matching the hole of an ear. A microphone (10) and a speaker (11) are installed in the hollow body. The speaker is so formed that a sound releasing hole faces the opening at the insert part, and two or more of the even number of sound releasing paths (12) of the same length and inner diameter are formed facing from the sound releasing hole to the opening. The microphone is installed in the opening at the insert part at a position apart from the sound releasing hole of the speaker, and a sound collecting path (15) collecting sound from the opening is formed of such a material that cannot directly collect sound from the sound releasing path of the speaker.

Description

technical field [0001] The present invention relates to an oscillation-echo cancellation system used for general telephones including mobile communication equipment such as wireless telephones and PHS, integral earphone microphones, translators, deaf-mute persons and vocal cord injuries Amplifiers for tourists, communicators for tourist guides, communicators for broadcasting, communicators for train attendants, headsets for operators, etc. aspect has an effect. Background technique [0002] In the past, wired and wireless sub-units used in mobile communications such as wireless phones or PHS have been known as communication equipment, and a communication system has been proposed in which the sub-units pass through a radio wave relay unit for telephones such as NTT Docomo and the main unit. The transmission system, and the communication equipment on the other side carry out two-way communication. [0003] Patent Document 1: Japanese Patent Laid-Open No. 2002-300074 [0004...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R1/10H04R3/02
CPCH04R1/1016H04R3/02H04R2499/11H04R1/10
Inventor 濑户信次
Owner NAP ENTERPRISE CO LTD
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