JPH0426237A - Dark noise detecting method and automatic level control loud-speaking system for sound field - Google Patents

Dark noise detecting method and automatic level control loud-speaking system for sound field

Info

Publication number
JPH0426237A
JPH0426237A JP13027190A JP13027190A JPH0426237A JP H0426237 A JPH0426237 A JP H0426237A JP 13027190 A JP13027190 A JP 13027190A JP 13027190 A JP13027190 A JP 13027190A JP H0426237 A JPH0426237 A JP H0426237A
Authority
JP
Japan
Prior art keywords
sound
signal
speaking
dark noise
loud
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP13027190A
Other languages
Japanese (ja)
Inventor
Meiji Takahashi
Original Assignee
Kajima Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Kajima Corp filed Critical Kajima Corp
Priority to JP13027190A priority Critical patent/JPH0426237A/en
Publication of JPH0426237A publication Critical patent/JPH0426237A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To easily monitor the level of dark noise in a sound field by comparing the sound field monitor signal of a sound field monitoring sound collector with a line signal in proportion to the output of an amplifier to drive a loudspeaker, obtaining a loud-speaking sound signal after separating the same waveform component,and using the difference between the sound field monitor signal and the loud-speaking sound signal as a dark noise signal.
CONSTITUTION: A sound field monitor sound collector 3 is provided to extract the line signal in proportion to the output from an amplifier to drive a loudspeaker 4 in a sound field 20, and to sense a loud-speaking tone from the loudspeaker 4 in the sound field 20 and the dark noise of the sound field 20. Then, the loud-speaking sound signal is formed after separating the same waveform component as the waveform of the line signal in the output of the sound field monitor sound collector 3, and the difference between the output of the sound field monitor sound collector 3 and the loud-speaking sound signal is used as the dark noise signal so as to detect the level of the dark noise signal. Thus, the level of the dark noise in the sound field can be easily detected.
COPYRIGHT: (C)1992,JPO&Japio
JP13027190A 1990-05-22 1990-05-22 Dark noise detecting method and automatic level control loud-speaking system for sound field Pending JPH0426237A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13027190A JPH0426237A (en) 1990-05-22 1990-05-22 Dark noise detecting method and automatic level control loud-speaking system for sound field

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13027190A JPH0426237A (en) 1990-05-22 1990-05-22 Dark noise detecting method and automatic level control loud-speaking system for sound field

Publications (1)

Publication Number Publication Date
JPH0426237A true JPH0426237A (en) 1992-01-29

Family

ID=15030310

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13027190A Pending JPH0426237A (en) 1990-05-22 1990-05-22 Dark noise detecting method and automatic level control loud-speaking system for sound field

Country Status (1)

Country Link
JP (1) JPH0426237A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832227A (en) * 1994-07-19 1996-02-02 Nitto Kogaku Kk Connection method for board
JP2009021658A (en) * 2007-07-10 2009-01-29 Yamaha Corp Sound emission and collection device
JP2010217807A (en) * 2009-03-19 2010-09-30 Dainichi Denshi:Kk Voice issuing state determination device
CN112208686A (en) * 2020-09-16 2021-01-12 纳恩博(天津)科技有限公司 Data processing method and electric motorcycle

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0832227A (en) * 1994-07-19 1996-02-02 Nitto Kogaku Kk Connection method for board
JP2009021658A (en) * 2007-07-10 2009-01-29 Yamaha Corp Sound emission and collection device
JP2010217807A (en) * 2009-03-19 2010-09-30 Dainichi Denshi:Kk Voice issuing state determination device
CN112208686A (en) * 2020-09-16 2021-01-12 纳恩博(天津)科技有限公司 Data processing method and electric motorcycle

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