Acoustic attenuation measurements using parametric arrays
✍ Scribed by J.Y. Guigné; V.H. Chin; S.M. Solomon
- Publisher
- Elsevier Science
- Year
- 1989
- Tongue
- English
- Weight
- 506 KB
- Volume
- 27
- Category
- Article
- ISSN
- 0041-624X
No coin nor oath required. For personal study only.
📜 SIMILAR VOLUMES
We propose a tunable acoustic absorbing device using a Helmholtz resonator. Timing the resolution frequency of the device to a desired frequency makes it possible to absorb variable sounds. The designed device forms an array of the Helmholtz resonator with a tunable compliance. The experimental resu
Use of a shortened dipole with its element length fixed at the 80-MHz resonator length or a half-wavelength is studied for the site-attenuation measurement of the interference-wave measurement field. Since this shortened dipole antenna is specified as the standard antenna for interference wave measu
A method will be presented which allows a construction of an acoustic source model based on the analysis of microphone array measurements during a train pass-by. The conventional array beam-forming technique is used as a kind of pre-processing or "rst order analysis to calculate in a second step the