JPS5520435A - Reverberation time measuring unit - Google Patents

Reverberation time measuring unit

Info

Publication number
JPS5520435A
JPS5520435A JP9333678A JP9333678A JPS5520435A JP S5520435 A JPS5520435 A JP S5520435A JP 9333678 A JP9333678 A JP 9333678A JP 9333678 A JP9333678 A JP 9333678A JP S5520435 A JPS5520435 A JP S5520435A
Authority
JP
Japan
Prior art keywords
circuit
reverberation
time point
time
measuring unit
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
JP9333678A
Other languages
Japanese (ja)
Inventor
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to JP9333678A priority Critical patent/JPS5520435A/en
Publication of JPS5520435A publication Critical patent/JPS5520435A/en
Pending legal-status Critical Current

Links

Landscapes

  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Reverberation, Karaoke And Other Acoustics (AREA)

Abstract

PURPOSE: To make a reverberation time measuring unit small-size and low-cost and make is possible to display immediately a reverberation time by constituting the measuring unit by a comparatively small number of elements such as a gate circuit, a rectifier circuit, an integrating circuit, an operator and a display equipment.
CONSTITUTION: Microphone 1 outputs reverberation waveform signals corresponding to an input acoustic wave. Output signals are caused to pass from a prescribed time point through amplifier 2 by first gate circuit 3 and are rectified by rectifier circuit 4. The output of rectifier circuit 4 is integrated by integrating circuit 5 into a voltage waveform which is increased according as time elapses. The integrated output at a time point where first prescribed time T1 elapses from prescribed time point tO is taken out by second gate circuit 6, and value V1 is held by first holding circuit 8, and the integrated output at a time point where second prescribed time T2 (T2>T1) elapses from prescribed time point tO is taken out by third gate circuit 7, and value V1 is held by second holding circuit 9. Reverberation time T is expressed by expressions (1) and (2). Operator 10 operates reverberation time according to these expressions and indicates directly to display equipment 11.
COPYRIGHT: (C)1980,JPO&Japio
JP9333678A 1978-07-31 1978-07-31 Reverberation time measuring unit Pending JPS5520435A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9333678A JPS5520435A (en) 1978-07-31 1978-07-31 Reverberation time measuring unit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9333678A JPS5520435A (en) 1978-07-31 1978-07-31 Reverberation time measuring unit

Publications (1)

Publication Number Publication Date
JPS5520435A true JPS5520435A (en) 1980-02-13

Family

ID=14079418

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9333678A Pending JPS5520435A (en) 1978-07-31 1978-07-31 Reverberation time measuring unit

Country Status (1)

Country Link
JP (1) JPS5520435A (en)

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