JPS564018A - Device for measuring wall surface transmission factor of sound - Google Patents
Device for measuring wall surface transmission factor of soundInfo
- Publication number
- JPS564018A JPS564018A JP7911579A JP7911579A JPS564018A JP S564018 A JPS564018 A JP S564018A JP 7911579 A JP7911579 A JP 7911579A JP 7911579 A JP7911579 A JP 7911579A JP S564018 A JPS564018 A JP S564018A
- Authority
- JP
- Japan
- Prior art keywords
- wall surface
- correlation
- sound
- transmission factor
- sought
- 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
- 230000005540 biological transmission Effects 0.000 title abstract 5
- 230000004069 differentiation Effects 0.000 abstract 1
- 230000010354 integration Effects 0.000 abstract 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Abstract
PURPOSE: To make it possible to measure the correct transmission factor of sound by differentiating the wall surface transmission waveform deformed by the long response time, of a test incident sound having a high frequency, as compared with a response time to the incident wave of the wall surface, and finding the correlation by returning the sound wave to a test sound wave.
CONSTITUTION: The output of a variable frequency oscillator 5 is modulated by the output of an M series random signal oscillator 3 through a multiplier 4, and applied to a loud speaker 2 through an amplifier. The sound wave transmitted through a wall surface 1 enters a microphone 7. The output signal of the microphone is differentiated in a differentiation circuit 10, and is eliminated of the integration effect due to the response of the wall surface 1. The output signal passes through a squre-law circuit 11 and enters a correlation operating circuit 12 and the correlation is sought. Then, the correlation when the wall surface 1 has been eliminated is sought. From the ratio between the correlation value when the wall surface 1 exists and that when it does not exist, the transmission factor of the wall surface is sought. Accordingly, on the actual spot where the wall surface exists, the correct transmission factor can be easily measured.
COPYRIGHT: (C)1981,JPO&Japio
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7911579A JPS564018A (en) | 1979-06-25 | 1979-06-25 | Device for measuring wall surface transmission factor of sound |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7911579A JPS564018A (en) | 1979-06-25 | 1979-06-25 | Device for measuring wall surface transmission factor of sound |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS564018A true JPS564018A (en) | 1981-01-16 |
Family
ID=13680907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7911579A Pending JPS564018A (en) | 1979-06-25 | 1979-06-25 | Device for measuring wall surface transmission factor of sound |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS564018A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017003276A (en) * | 2015-06-04 | 2017-01-05 | 鹿島建設株式会社 | Acoustic performance estimation method, acoustic performance estimation device, and acoustic performance estimation program |
| CN110716530A (en) * | 2019-10-11 | 2020-01-21 | 山东中实易通集团有限公司 | DCS response time testing device and method |
-
1979
- 1979-06-25 JP JP7911579A patent/JPS564018A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2017003276A (en) * | 2015-06-04 | 2017-01-05 | 鹿島建設株式会社 | Acoustic performance estimation method, acoustic performance estimation device, and acoustic performance estimation program |
| CN110716530A (en) * | 2019-10-11 | 2020-01-21 | 山东中实易通集团有限公司 | DCS response time testing device and method |
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