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Scope. This specification covers the requirements for headset-microphones with rigid headband. These parts meet established requirements for communications equipment used to protect against hazardous noise exposure and are approved for use in certain high and moderate ambient...
QUALIFIED PRODUCT LIST OF PRODUCTS QUALIFIED UNDER PERFORMANCE SPECIFICATION MIL-PRF-87819 Headset-Microphone, (Hearing Protective Type, High and Moderate Ambient Noise Levels), General Specification for This list has been prepared for use by or for the Government in the...
Headset-microphone PIN M87819/8 is a high ambient noise level headset-microphone designed for use by F-35 flight deck personnel to provide communication under the extreme noise conditions encountered in close proximity to F-35 and other fighter, transport, and tanker aircraft engines, on the flight...
Introduction The locally prevailing air temperature, the moisture content in the air (% relative humidity), and the temperature at which moisture will condense on surfaces (dew point) are commonly called the ambient conditions. If these conditions are not within the ranges required by a...
This standard specifies requirements and procedures for the measurement of sound pressure levels in building spaces or rooms. These requirements and procedures apply ideally to measurements performed in unoccupied spaces, with normal building services and HVAC equipment operating under...
Hearing measurements in an audiometric test room may be conducted for different audiometric purposes over different test frequency ranges. However, if the ambient noise level is excessively high, some hearing threshold levels measured in that environment will be...
5.1 This practice is recommended for use in measuring the concentration of VOCs in ambient, indoor, and workplace atmospheres. It may also be used for measuring emissions from materials in small or full scale environmental chambers for material emission testing or human exposure assessment....
This specification covers the requirements for manually fed, motor-driven vertically oscillating arm type, automatically controlled, commercial pot, pan, and utensil washing machine (also referred to as "the washer"). The washer is of one rack capacity (Type I) and is available in either Style A...
5.1 The speech privacy between locations in an open plan space is determined by the degree to which intruding speech sounds exceed the ambient sound pressure levels at the listener's ear; a classic signal-to-noise ratio situation. 5.2 The sound pressure levels at the...
Scope. This specification covers headsets and headset-microphone assemblies intended for use in medium ambient noise level environments of 85-105 dBA SPL (Sound Pressure Level). These headset-microphone assemblies use dynamic earphones of the moving coil type that...
