JPS5562318A - Sound-absorbing material - Google Patents
Sound-absorbing materialInfo
- Publication number
- JPS5562318A JPS5562318A JP13445778A JP13445778A JPS5562318A JP S5562318 A JPS5562318 A JP S5562318A JP 13445778 A JP13445778 A JP 13445778A JP 13445778 A JP13445778 A JP 13445778A JP S5562318 A JPS5562318 A JP S5562318A
- Authority
- JP
- Japan
- Prior art keywords
- featuring
- discontinuous
- acoustic
- plural materials
- wavelength
- 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
- Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)
- Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
- Transducers For Ultrasonic Waves (AREA)
Abstract
PURPOSE: To obtain the sound-absorbing material which does not produce the discontinuous part for the inner acoustic impedance to the wavelength of the carrier ultrasonic wave by connecting the plural materials of different acoustic characteristics, i.e., the plural materials featuring a large absorption coefficient and the plural materials featuring a high matching properties to the water in such a way as to secure the discontinuous acoustic characteristics.
CONSTITUTION: A junction is secured through the fusion to the surfaces of component 4 composed of material A featuring the acoustic impednace of virtually equal value of that of the water and component 5 composed of material B featuring a large absorption coefficient. The both components 4 and 5 are connected in a considerably small value at junction part C in comparison with the wavelength of the ultrasonic wave, and as a result the acoustic impedance features virtaully the discontinuous variation. Accordingly, the noise disturbing the measurement is never produced.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13445778A JPS5562318A (en) | 1978-11-02 | 1978-11-02 | Sound-absorbing material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP13445778A JPS5562318A (en) | 1978-11-02 | 1978-11-02 | Sound-absorbing material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5562318A true JPS5562318A (en) | 1980-05-10 |
Family
ID=15128777
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP13445778A Pending JPS5562318A (en) | 1978-11-02 | 1978-11-02 | Sound-absorbing material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5562318A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0771762A (en) * | 1993-08-31 | 1995-03-17 | Rinnai Corp | Grill apparatus |
JP2020143937A (en) * | 2019-03-04 | 2020-09-10 | 中道鉄工株式会社 | Ultrasonic leakage inspection device |
-
1978
- 1978-11-02 JP JP13445778A patent/JPS5562318A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0771762A (en) * | 1993-08-31 | 1995-03-17 | Rinnai Corp | Grill apparatus |
JP2020143937A (en) * | 2019-03-04 | 2020-09-10 | 中道鉄工株式会社 | Ultrasonic leakage inspection device |
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