Electroacoustics. Measurement microphones - Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique Ingestion-build-50790 Although the test method is

Although the test method is capable of indicating those articles that are embrittled to the extent defined it does not guarantee complete freedom from embrittlement

fabrication and erection

Contents of BS EN 12350-4:

Entities involved in specifying

the measurement of local velocities and the calculation of the flow-rate by velocity integration

Electroacoustics. Measurement microphones - Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique Ingestion-build-50790 Although the test method is1 Scope This part of IEC 61094 specifies a primary method of determining the complex free field sensitivity of laboratory standard microphones so as to establish a reproducible and accurate basis for the measurement of sound pressure under free field conditions, is applicable to laboratory standard microphones meeting the requirements of IEC 610941, is intended for use by laboratories with highly experienced staff and specialized equipment. NOTE The