Author: Harvey H. HubbardPublisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 452
Book Description
Aeroacoustics of Flight Vehicles: Noise control
Author: Harvey H. HubbardPublisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 452
Book Description
NASA Reference Publication
Author: Effect of Noise Spectra and a Listening Task Upon Passenger Annoyance in a Helicopter Interior Noise Environment
Author: Sherman A. ClevensonPublisher:
ISBN:
Category : Airplanes
Languages : en
Pages : 32
Book Description
A laboratory study was conducted to determine the effects of helicopter interior noise on passenger annoyance. Bothe reverie and listening situations were studied as well as the relative effectiveness of several descriptors (i.e., overall sound pressure level, A-weighted sound pressure level, and speech interference level) for quantifying annoyance response for these situations. The noise stimuli were based upon recordings of the interior noise of the NASA Civil Helicopter Research Aircraft. These noises were presented at levels ranging from approximately 68 to 86 dB(A) with various gear clash tones selectively attenuated to give a range of spectra. The listening tasks required the subjects to listen to and record phonetically balanced words presented within the various noise environments. Results indicate that annoyance during a listening condition is generally higher than annoyance during a reverie condition for corresponding interior noise environments. Attenuation of the planetary gear clash tone results in increases in listening performance but has negligible effect upon annoyance for a given noise level. The noise descriptor most effective for estimating annoyance response under conditions of reverie and listening situations is shown to be the A-weighted sound pressure level. (Author).
Aeroacoustics of Flight Vehicles
Author: Harvey H. HubbardPublisher:
ISBN:
Category : Aerodynamic noise
Languages : en
Pages : 456
Book Description
Effects of Time-varying Noise Annoyance, a Review
Author: Effects of Aircraft Noise
Author: Vincent MestrePublisher: Transportation Research Board
ISBN: 0309098068
Category : Airplanes
Languages : en
Pages : 99
Book Description
"TRB's Airport Cooperative Research Program (ACRP) Synthesis 9: Effects of Aircraft Noise: Research Update on Select Topics includes an annotated bibliography and summary of new research on the effects of aircraft noise. The report is designed to update and complement the U.S. Federal Aviation Administration's 1985 Aviation Noise Effects report"--Publisher's description
Regulatory Analysis for the Noise Emission Regulations for Motorcycles and Motorcycle Exhaust Systems
Author: United States. Office of Noise Abatement ControlPublisher:
ISBN:
Category : Motorcycles
Languages : en
Pages : 358
Book Description
Author: 
Author: D. G. Stephens
Author: