can be performed either with a coupler or in a free field situation.
The basic principle of the reciprocity calibration method is that three transducers, all of which are uncalibrated, are used as emitter and receiver successively.
1, reciprocity calibration process consists of three steps.
The reciprocity calibration process is relatively straightforward.
In this paper we review the theoretical basis of the reciprocity parameter and reciprocity calibration of AE sensors.
Key words: acoustic measurements; acoustical calibration; calibration of microphones; electroacoustics; laboratory standard microphone; measuring microphone; microphone calibration; microphone pressure calibration; microphone reciprocity calibration; pressure reciprocity calibration of microphones; reciprocity calibration; standard microphones.
A block diagram of the microphone pressure reciprocity calibration system is shown in Fig.
The reciprocity calibration procedure implemented at NIST is a primary method used to determine the sensitivities of three microphones in a triad comprising two NIST-owned microphones (microphones 1 and 2) and the customer microphone (microphone 3).
Reciprocity calibration works on reciprocity theorem that is known from electrical circuits.
The primary advantage of the reciprocity calibration technique is that it avoids the necessity of measuring or producing a known mechanical displacement or force.
This method is based on a method of reciprocity calibration, modified by Goujon and Baboux .
Marcotte: "The Reciprocity Calibration
of Piezoelectric Accelerometers", Journal of Acoustical Society of America, 24, (4), July 1952.