Author: Donald C. Gasaway
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Acoustic noise within aircraft during flight often causes some degree of interference with aural communication. Several methods have been used over the years to identify and predict degrees of speech interference. Six of these methods are discussed: four involve octave-band averaging; two use frequency weighting. The assessment is based on application of each of the six indices to noise levels measured within the cockpits of 191 fixed-wing and 58 rotary-wing aircraft, grouped into 11 categories by engine type. Equivalent speech interference levels obtained from the use of each of the six indices are provided for the acoustic spectra developed for the 11 classes of vehicles. The operational considerations which influence speech interference values are described. Noise attenuation provided by headset devices commonly used by Air Force aircrew members is shown for different groups of noise spectra. Criteria are given for evaluating protected and unprotected exposures to noise that compromise communications. (Author).
Six Indices for Predicting Speech Interference Within Aircraft
Author: Donald C. Gasaway
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Acoustic noise within aircraft during flight often causes some degree of interference with aural communication. Several methods have been used over the years to identify and predict degrees of speech interference. Six of these methods are discussed: four involve octave-band averaging; two use frequency weighting. The assessment is based on application of each of the six indices to noise levels measured within the cockpits of 191 fixed-wing and 58 rotary-wing aircraft, grouped into 11 categories by engine type. Equivalent speech interference levels obtained from the use of each of the six indices are provided for the acoustic spectra developed for the 11 classes of vehicles. The operational considerations which influence speech interference values are described. Noise attenuation provided by headset devices commonly used by Air Force aircrew members is shown for different groups of noise spectra. Criteria are given for evaluating protected and unprotected exposures to noise that compromise communications. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 35
Book Description
Acoustic noise within aircraft during flight often causes some degree of interference with aural communication. Several methods have been used over the years to identify and predict degrees of speech interference. Six of these methods are discussed: four involve octave-band averaging; two use frequency weighting. The assessment is based on application of each of the six indices to noise levels measured within the cockpits of 191 fixed-wing and 58 rotary-wing aircraft, grouped into 11 categories by engine type. Equivalent speech interference levels obtained from the use of each of the six indices are provided for the acoustic spectra developed for the 11 classes of vehicles. The operational considerations which influence speech interference values are described. Noise attenuation provided by headset devices commonly used by Air Force aircrew members is shown for different groups of noise spectra. Criteria are given for evaluating protected and unprotected exposures to noise that compromise communications. (Author).
SAM-TR.
Author:
Publisher:
ISBN:
Category : Space medicine
Languages : en
Pages : 20
Book Description
Publisher:
ISBN:
Category : Space medicine
Languages : en
Pages : 20
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1028
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1028
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Report (USAF School of Aerospace Medicine). [65-90], [1970]
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 586
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 586
Book Description
SAM-TR.
Author:
Publisher:
ISBN:
Category : Space medicine
Languages : en
Pages : 40
Book Description
Publisher:
ISBN:
Category : Space medicine
Languages : en
Pages : 40
Book Description
Report (USAF School of Aerospace Medicine). [34-49], [1971]
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 336
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 336
Book Description
Aeronautical Engineering
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 538
Book Description
Technical Documentary Report, SAM-TDR
Author: USAF School of Aerospace Medicine
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 292
Book Description
NASA Reference Publication
Author:
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 466
Book Description
Publisher:
ISBN:
Category : Astronautics
Languages : en
Pages : 466
Book Description
Otolaryngology
Author:
Publisher:
ISBN:
Category : Otolaryngology
Languages : en
Pages : 1186
Book Description
Publisher:
ISBN:
Category : Otolaryngology
Languages : en
Pages : 1186
Book Description