JPS5560824A - Reverberation time measuring instrument - Google Patents

Reverberation time measuring instrument

Info

Publication number
JPS5560824A
JPS5560824A JP13401778A JP13401778A JPS5560824A JP S5560824 A JPS5560824 A JP S5560824A JP 13401778 A JP13401778 A JP 13401778A JP 13401778 A JP13401778 A JP 13401778A JP S5560824 A JPS5560824 A JP S5560824A
Authority
JP
Japan
Prior art keywords
sound energy
reverberation time
controlled
switches
squarer
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
JP13401778A
Other languages
Japanese (ja)
Inventor
Osamu Yamaguchi
Takayoshi Hirata
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.)
Sony Corp
Original Assignee
Sony 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 Sony Corp filed Critical Sony Corp
Priority to JP13401778A priority Critical patent/JPS5560824A/en
Publication of JPS5560824A publication Critical patent/JPS5560824A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)

Abstract

PURPOSE: To facilitate repeated reverberation time measurements, sound energy integrating times are differently controlled in response to the sound energy.
CONSTITUTION: Microphone's 1 sound signal energy emitted from the squarer 5 is integrated by the integrator 6 in the integrator circuit 17. The sound energy is passed through the switches 8a and 8b having different closed times to become two types of sound energy having different integration times and held on the circuits 9a and 9b. The held values are processed by the substractor 11, the logarithmic circuits 12a and 12b, the substractors 13 and 15, etc. to permit the display 16 to indicate a reverberation time. The switches 8a and 8b are controlled by the arithmetic amplifier 7 which compares the output sound energy from the squarer 3 with the reference value. The switches are also controlled by the monostable multivibrators 10a and 10b, etc. and provide two automatically controlled integration times in response to the sound energy, and as such, repeated reverberation time measurements are facilitated.
COPYRIGHT: (C)1980,JPO&Japio
JP13401778A 1978-10-31 1978-10-31 Reverberation time measuring instrument Pending JPS5560824A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP13401778A JPS5560824A (en) 1978-10-31 1978-10-31 Reverberation time measuring instrument

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP13401778A JPS5560824A (en) 1978-10-31 1978-10-31 Reverberation time measuring instrument

Publications (1)

Publication Number Publication Date
JPS5560824A true JPS5560824A (en) 1980-05-08

Family

ID=15118418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP13401778A Pending JPS5560824A (en) 1978-10-31 1978-10-31 Reverberation time measuring instrument

Country Status (1)

Country Link
JP (1) JPS5560824A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205224A (en) * 1984-03-30 1985-10-16 Shimizu Constr Co Ltd Reverberation measuring apparatus

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS60205224A (en) * 1984-03-30 1985-10-16 Shimizu Constr Co Ltd Reverberation measuring apparatus
JPH0568646B2 (en) * 1984-03-30 1993-09-29 Shimizu Construction Co Ltd

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