Loading...
Please wait, while we are loading the content...
Similar Documents
Annoyance due to simulated blade-slap noise
| Content Provider | NASA Technical Reports Server (NTRS) |
|---|---|
| Author | Powell, C. A. |
| Copyright Year | 1978 |
| Description | The effects of several characteristics of blade slap noise on annoyance response were studied. These characteristics or parameters were the sound pressure level of the continuous noise used to simulate helicopter broadband noise, the ratio of impulse peak to broadband noise or crest factor, the number of pressure excursions comprising an impulse event, the rise and fall time of the individual impulses, and the repetition frequency of the impulses. Analyses were conducted to determine the correlation between subjective response and various physical measures for the range of parameters studied. A small but significant improvement in the predictive ability of PNL was provided by an A-weighted crest factor correlation. No significant improvement in predictive ability was provided by a rate correction. |
| File Size | 2464818 |
| Page Count | 15 |
| File Format | |
| Alternate Webpage(s) | http://archive.org/details/NASA_NTRS_Archive_19790002676 |
| Archival Resource Key | ark:/13960/t2r54f76t |
| Language | English |
| Publisher Date | 1978-08-01 |
| Access Restriction | Open |
| Subject Keyword | Acoustics Psychoacoustics Impulses Effective Perceived Noise Levels Helicopters Blade-vortex Interaction Noise Tolerance Correction Rotary Wings Sound Pressure Human Tolerances Human Reactions Statistical Correlation Blade Slap Noise Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science |
| Content Type | Text |
| Resource Type | Article |
