Add to ORKGExternal and internal aircraft noise requirements are discussed in terms of application to military helicopters. The impact of the application of noise reduction technology to comply with FAA standards on cost and performance is emphasized
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representat...
PDFTech ReportFAA-RD-77-94HelicoptersAircraft noiseSound levelEffective sound pressureAcoustic emiss...
A study was conducted to define those criteria necessary for civil helicopter operations to be acous...
Enactment of helicopter noise certification standards for the control of noise impact contributing t...
A review of helicopter noise measurement programs and noise reduction/economic studies of FAA is giv...
Exterior and interior noise problems are addressed both from the physics and engineering as well as ...
Analytical methods were developed and/or adopted for calculating helicopter component noise, and the...
The relationship between the internal noise environment of helicopters and the ability of personnel ...
The Temporary Threshold Shift (TTS) or temporary hearing loss caused by excessive interior noise in ...
November 1971Includes bibliographical references (p. 52)The relationship between noise reduction and...
The interior noise levels of existing helicopters are discussed along with an ongoing experimental p...
The helicopter acoustics program at NASA Langley has included technology for elements of noise contr...
A field noise measurement program has been conducted using both a standard SH-3A helicopter and an S...
A field noise measurement program has been conducted on a standard OH-6A helicopter and one that had...
A broad perspective of needs in helicopter exterior and interior control is presented. Emphasis is g...
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representat...
PDFTech ReportFAA-RD-77-94HelicoptersAircraft noiseSound levelEffective sound pressureAcoustic emiss...
A study was conducted to define those criteria necessary for civil helicopter operations to be acous...
Enactment of helicopter noise certification standards for the control of noise impact contributing t...
A review of helicopter noise measurement programs and noise reduction/economic studies of FAA is giv...
Exterior and interior noise problems are addressed both from the physics and engineering as well as ...
Analytical methods were developed and/or adopted for calculating helicopter component noise, and the...
The relationship between the internal noise environment of helicopters and the ability of personnel ...
The Temporary Threshold Shift (TTS) or temporary hearing loss caused by excessive interior noise in ...
November 1971Includes bibliographical references (p. 52)The relationship between noise reduction and...
The interior noise levels of existing helicopters are discussed along with an ongoing experimental p...
The helicopter acoustics program at NASA Langley has included technology for elements of noise contr...
A field noise measurement program has been conducted using both a standard SH-3A helicopter and an S...
A field noise measurement program has been conducted on a standard OH-6A helicopter and one that had...
A broad perspective of needs in helicopter exterior and interior control is presented. Emphasis is g...
Calculated engine core noise levels, based on NASA-Lewis prediction procedures, for five representat...
PDFTech ReportFAA-RD-77-94HelicoptersAircraft noiseSound levelEffective sound pressureAcoustic emiss...
A study was conducted to define those criteria necessary for civil helicopter operations to be acous...