JPS5788329A - Measuring device for acoustic characteristic - Google Patents

Measuring device for acoustic characteristic

Info

Publication number
JPS5788329A
JPS5788329A JP16322680A JP16322680A JPS5788329A JP S5788329 A JPS5788329 A JP S5788329A JP 16322680 A JP16322680 A JP 16322680A JP 16322680 A JP16322680 A JP 16322680A JP S5788329 A JPS5788329 A JP S5788329A
Authority
JP
Japan
Prior art keywords
waveform
differentiation
equation
output
measuring
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
JP16322680A
Other languages
Japanese (ja)
Inventor
Mikio Higashiyama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone 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 Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP16322680A priority Critical patent/JPS5788329A/en
Publication of JPS5788329A publication Critical patent/JPS5788329A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
    • G01H7/00—Measuring reverberation time ; room acoustic measurements

Abstract

PURPOSE:To measure the average damping coefft. in an acoustic system as well as the acoustic output, etc. of a sound source directly, automatically and accurately without measuring reverberation time. CONSTITUTION:A generated impulsive sound is converted to an electric signal by a microphone 1, after which the signal is applied to a set average reverberation waveform measuring part 2 which determines the set average reverberation waveform E1(t) of the time when the time (t) elapses after stopping of the impulsive sound through operation of the equation 1. Here, KN: the damping coefft. of N-order surge mode, and A: the proportional constant relating to the acousting output of the sound source. After a transient waveform is measured, the output thereof is applied to a linear differentiation measuring part 3 and a quadratic differentiation measuring part 4 as differentiation waveform measuring parts. In the part 3, it is measured as a differentiation waveform by the equation 2 in the part 3 and by the equation 3 in the part 4. After the differentiation waveforms of the transient waveform are measured by these, these outputs are applied discretely to an arithmetic processing part 5. The operation of the equation 4 is carried out as prescribed operation, whereby the average damping coefft. 2KN is determined and is transmitted to an output 6.
JP16322680A 1980-11-21 1980-11-21 Measuring device for acoustic characteristic Pending JPS5788329A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16322680A JPS5788329A (en) 1980-11-21 1980-11-21 Measuring device for acoustic characteristic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16322680A JPS5788329A (en) 1980-11-21 1980-11-21 Measuring device for acoustic characteristic

Publications (1)

Publication Number Publication Date
JPS5788329A true JPS5788329A (en) 1982-06-02

Family

ID=15769709

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16322680A Pending JPS5788329A (en) 1980-11-21 1980-11-21 Measuring device for acoustic characteristic

Country Status (1)

Country Link
JP (1) JPS5788329A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009080511A (en) * 2009-01-22 2009-04-16 Clarion Co Ltd Impulse response measuring device and impulse response measuring method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009080511A (en) * 2009-01-22 2009-04-16 Clarion Co Ltd Impulse response measuring device and impulse response measuring method

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