Pistonfon - A device equipped with a rigid piston driven in reciprocating motion of a given frequency and amplitude, designed to create a given sound pressure in a small closed cavity
Description and application of pistonfon PP10A:
The Pistonphone is a noise generator for microphone calibration.
Specifications pistonfon PP10A:
Constant sound pressure level from 118 to 126 dB.
Absolute error, no more than +/- 0.3 dB.
Frequency of generated sinusoidal oscillations (285-315) +/- 0.3 Hz
Nonlinear distortion coefficient of generated sinusoidal oscillations, no more than 10%.
On the back, there is a compartment for batteries.
Examples of using a pistonphone:
Microphone test:
The signal from the generator, which is part of the system, goes to the power amplifier. From the power amplifier to a small-volume chamber, in which a given sound signal is generated. The generator provides scanning at specified frequencies and maintaining the specified amplitude on an exemplary microphone. The comparison method evaluates the sensitivity of the microphone being verified and its error, taking into account all components.
Sound level meter check:
Sound level meter testing includes the following items:
Determination of the frequency response of the sound level meter by the free field;
Determination of the frequency response of the sound level meter by the diffuse field;
Determination of the frequency response of the sound level meter by pressure;
Determination of the error of the sound level meter at a reference frequency of 1000 Hz;
Determination of the frequency characteristics of the sound level meter A, B, C, D, Lin;
Determination of the error of the scale switch of the measurement limits of the sound level meter;
Determination of the lower limit of the dynamic range of the sound level meter;
Determination of the temporal characteristics of the sound level meter: F, S, I, Peak;
Determination of the error of the energy summation of the sound level meter;
Determination of the nonlinear amplitude characteristics of the amplifier and measuring instrument of the sound level meter;
Overload indicator test;
Determination of nonlinear distortion.
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