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Noise canceller, sound collector having the noise canceller, and portable phone having the noise canceller

A technology of noise eliminator and portable phone, which is applied in the direction of microphone, telephone communication, transmission noise suppression, etc., and can solve the problem that it is impossible to remove noise, etc.

Inactive Publication Date: 2009-01-21
RICOH KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, if the electrical signal from the second microphone contains electrical noise, it is impossible to effectively remove the noise

Method used

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  • Noise canceller, sound collector having the noise canceller, and portable phone having the noise canceller
  • Noise canceller, sound collector having the noise canceller, and portable phone having the noise canceller
  • Noise canceller, sound collector having the noise canceller, and portable phone having the noise canceller

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Embodiment Construction

[0039] Referring now to Figure 1 to Figure 6 , a description of the invention including embodiments of the invention and details of disadvantages of the related art are given.

[0040] FIG. 1 is a view showing a structural example of a sound collector having a noise canceller of an embodiment of the present invention.

[0041] As shown in Figure 1, sound collector 1 comprises: the first microphone 2, the second microphone 3, the first amplifier circuit 4, the second amplifier circuit 5, the first A / D conversion circuit 6, the second A / D conversion circuit 7 and digital signal processing circuit 8 .

[0042] The first microphone 2 picks up a desired sound. The second microphone 3 collects ambient noise. The first amplifier circuit 4 amplifies the output signal of the first microphone 2 . The second amplifier circuit 5 amplifies the output signal of the second microphone 3 . The first A / D conversion circuit 6 A / D-converts the output signal of the first amplifier circuit 4 ...

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PUM

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Abstract

A noise canceller configured to remove surrounding noise from a desirable sound collected by a first microphone, the noise canceller includes a second microphone arranged in a place separated from the first microphone and configured to collect the surrounding noise; a second amplifier circuit part configured to amplify an output signal of the second microphone and output the output signal; and a signal processing circuit part configured to remove the surrounding noise from a sound collected by the first microphone by using the output signal of the second amplifier circuit part. The second amplifier circuit part is provided in the vicinity of the second microphone.

Description

technical field [0001] The present invention generally relates to a noise canceller, a sound collector with a noise canceller, and a portable phone with a noise canceller. [0002] More specifically, the present invention relates to a noise canceller for a sound collector or a cellular phone and configured to remove ambient noise from a desired collected sound, a sound collector having the noise canceller, and a portable phone having the noise canceller. Telephone. Background technique [0003] In the case of making a call using a mobile phone, when the call is made in a noisy place such as a subway, ambient noise is transmitted to the receiving party of the call, so it is difficult for the receiving party to hear the sound. [0004] Therefore, many kinds of noise cancellers for canceling environmental noise have conventionally been proposed. [0005] In the noise canceller, a first microphone for picking up the speaking voice of a talker and a second microphone for pickin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04M1/00H04B15/00H04M1/60H04R1/02
CPCH04R3/005H04M1/0214H04R2410/05H04R2499/11H04M1/6033H04B1/10H04B15/00
Inventor 道吉启
Owner RICOH KK