JPS5560824A - Reverberation time measuring instrument - Google Patents
Reverberation time measuring instrumentInfo
- 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
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
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS60205224A (en) * | 1984-03-30 | 1985-10-16 | Shimizu Constr Co Ltd | Reverberation measuring apparatus |
-
1978
- 1978-10-31 JP JP13401778A patent/JPS5560824A/en active Pending
Cited By (2)
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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