Loading...
Please wait, while we are loading the content...
Similar Documents
Directional acoustic measurements by laser doppler velocimeters. [for jet aircraft noise
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Testerman, M. K. Mazumder, M. K. Overbey, R. L. |
| Copyright Year | 1976 |
| Description | Laser Doppler velocimeters (LDVs) were used as velocity microphones to measure sound pressure level in the range of 90-130 db, spectral components, and two-point cross correlation functions for acoustic noise source identification. Close agreement between LDV and microphone data is observed. It was concluded that directional sensitivity and the ability to measure remotely make LDVs useful tools for acoustic measurement where placement of any physical probe is difficult or undesirable, as in the diagnosis of jet aircraft noise. |
| File Size | 8840810 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19760015441 |
| Archival Resource Key | ark:/13960/t7cs0m43r |
| Language | English |
| Publisher Date | 1976-05-01 |
| Access Restriction | Open |
| Subject Keyword | Lasers And Masers Remote Sensors Acoustic Measurement Laser Doppler Velocimeters Jet Aircraft Noise Cross Correlation Noise Spectra Microphones Ntrs Nasa Technical Reports ServerĀ (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Technical Report |