This standard covers piezoelectric (including ferro-electric)
pressure transducers and piezoelectric sound pressure transducers.
Pressure and sound-pressure types could be the same instrument
differing only in the method of calibration and manner of
specifying performance. With the exception of certain impedance and
charge measurements, this standard is also applicable to
piezoelectric transducers with built-in amplifiers.
Sound pressure transducers sense and measure the pressure
oscillations within an elastic fluid medium experiencing
stress-strain waves. When installed near the sound source or in the
wall of a test object, the transducer behavior relates to its
pressure response. When installed in a sound field, considerable
interaction occurs at higher frequencies during the measuring
transaction, changing the quantity being measured and relating
transducer behavior to its free-field or diffusefield response.
Both aspects of transducer behavior are covered in this
Included among the specific types of piezoelectric pressure
transducers to which this standard is applicable are the
a) Piezoelectric pressure transducers for transient pressure
b) Piezoelectric pressure transducers that, in conjunction with
associated electronic equipment, have quasi-dc response to gage
c) Piezoelectric transducers for sound pressure levels in excess
of 100 dB overall re 20 μ Pa associated with fluid-borne noise
Terminology used in this document is defined in ISA-S37.1,
except that additional definitions particularly applicable to
piezoelectric pressure and piezoelectric sound-pressure transducers
are defined in 4.3 of this document.
This Standard establishes the following for piezoelectric
pressure and piezoelectric soundpressure transducers.
Uniform minimum general specifications for describing design and
Selected uniform acceptance and qualification test methods,
including calibration techniques
Uniform procedures for the presentation of transducer test
A drawing symbol for use on measurement system electrical
schematics (See Note in Section 3.)
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