JPH0430440U - - Google Patents
Info
- Publication number
- JPH0430440U JPH0430440U JP7159990U JP7159990U JPH0430440U JP H0430440 U JPH0430440 U JP H0430440U JP 7159990 U JP7159990 U JP 7159990U JP 7159990 U JP7159990 U JP 7159990U JP H0430440 U JPH0430440 U JP H0430440U
- Authority
- JP
- Japan
- Prior art keywords
- fan motor
- resonant tube
- fan
- microphone
- resonates
- 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
- 230000002159 abnormal effect Effects 0.000 claims description 2
- 238000001514 detection method Methods 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Landscapes
- Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7159990U JPH0430440U (en]) | 1990-07-05 | 1990-07-05 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7159990U JPH0430440U (en]) | 1990-07-05 | 1990-07-05 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0430440U true JPH0430440U (en]) | 1992-03-11 |
Family
ID=31608777
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7159990U Pending JPH0430440U (en]) | 1990-07-05 | 1990-07-05 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0430440U (en]) |
-
1990
- 1990-07-05 JP JP7159990U patent/JPH0430440U/ja active Pending