PCB Piezotronics 130B40, Инструкция по установке и эксплуатации

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Each 130B series Microphone can measure audio frequencies ranging from 20 Hz to 20 kHz,
with a broad dynamic range from 32 dBA to 142 dB. See Figure 2. The Microphone has a built-
in TEDS (Transducer Electronics Data Sheet) chip that provides the unit’s sensitivity, calibration
date, location and other data for traceability. Its light weight minimizes the impact of its mass
loading on thin material and facilitates using only a thin, double-sided adhesive pad (provided) to
attach the microphone, and its fairing when needed, to the test surface. The Microphone uses a
front vent for pressure equalization, making it an excellent choice when it is used on aircraft and
on road vehicles in mountainous terrain, and also allowing for adhesive or flush mounting.
Additionally, the mesh of the microphone’s protective grid repels water.
Figure 2: Typical pressure frequency response curve of Series 130B Series Surface Microphones
3.0 Powering
All ICP

powered microphones require the correct constant-current excitation for proper
operation. For this reason, use only PCB constant-current signal conditioners or other approved
constant-current sources. The signal conditioner consists of a regulated, 18–30 VDC source. The
power is regulated by a current-limiting circuit, which provides the constant current excitation
required for proper operation of the ICP
®
microphone. In general, battery powered devices offer
versatility for portable low-noise measurements, whereas line-powered units provide the
capability for continuous monitoring. A typical system schematic is shown in Figure 3.
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