JPH0447253B2 - - Google Patents
Info
- Publication number
- JPH0447253B2 JPH0447253B2 JP62297225A JP29722587A JPH0447253B2 JP H0447253 B2 JPH0447253 B2 JP H0447253B2 JP 62297225 A JP62297225 A JP 62297225A JP 29722587 A JP29722587 A JP 29722587A JP H0447253 B2 JPH0447253 B2 JP H0447253B2
- Authority
- JP
- Japan
- Prior art keywords
- sound
- absorbing material
- cylindrical body
- white noise
- microphone
- 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.)
- Expired - Lifetime
Links
- 239000011358 absorbing material Substances 0.000 claims description 50
- 238000010521 absorption reaction Methods 0.000 claims description 18
- 238000005259 measurement Methods 0.000 claims description 9
- 238000013459 approach Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
Landscapes
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Soundproofing, Sound Blocking, And Sound Damping (AREA)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62297225A JPH01138427A (ja) | 1987-11-25 | 1987-11-25 | 音響測定装置 |
| DK663788A DK663788A (da) | 1987-11-25 | 1988-11-28 | Lydmaaleapparat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62297225A JPH01138427A (ja) | 1987-11-25 | 1987-11-25 | 音響測定装置 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01138427A JPH01138427A (ja) | 1989-05-31 |
| JPH0447253B2 true JPH0447253B2 (da) | 1992-08-03 |
Family
ID=17843791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62297225A Granted JPH01138427A (ja) | 1987-11-25 | 1987-11-25 | 音響測定装置 |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPH01138427A (da) |
| DK (1) | DK663788A (da) |
-
1987
- 1987-11-25 JP JP62297225A patent/JPH01138427A/ja active Granted
-
1988
- 1988-11-28 DK DK663788A patent/DK663788A/da not_active Application Discontinuation
Also Published As
| Publication number | Publication date |
|---|---|
| DK663788D0 (da) | 1988-11-28 |
| DK663788A (da) | 1990-05-29 |
| JPH01138427A (ja) | 1989-05-31 |
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