Loading...
Please wait, while we are loading the content...
Similar Documents
Measurements of acoustic sources in motion
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Maestrello, L. Norum, T. D. |
| Copyright Year | 1978 |
| Description | Results of the far-field pressures measured from three different types of moving sources are presented. These acoustic sources consist of a point monopole, a small model jet, and an aircraft. Results for the pressure time history produced by the point source show good agreement with those predicted analytically. Both actual and simulated forward motion of the model jet show reductions in noise levels with forward speed at all angles between the source and observer. Measurement with the aircraft over both an anechoic floor and over the ground yields a method for evaluating the transfer function for ground reflections at various angles between the moving aircraft and measurement position. |
| File Size | 1258639 |
| Page Count | 14 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790008478 |
| Archival Resource Key | ark:/13960/t9n34nn03 |
| Language | English |
| Publisher Date | 1978-12-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Acoustic Measurement Aircraft Noise Jet Aircraft Far Fields Pressure Measurement Noise Measurement Graphs Charts Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
