Electrostatic Actuator with Power Amplifier VS-335 and VS-329

Brief Description

Actuator amplifier VS-329 is intended for delivering polarization voltage (200 V or 800 V) summarized with amplified signal for electrostatic excitation of actuator during the calibration of microphones.

The electrostatic actuator is intended to obtain FRF using the electrostatic method (based on pressure), while performing calibration of microphones. The set includes actuators for ¼’, ½’ and 1’-inch microphones in the range from 20 Hz – 20 kHz.

It’s possible to produce the actuator for ¼ and 1-inch microphones.

Technical Features

Technical Features VS-329
Rated frequency range, Hz 5 ÷ 20000
FRF non-linearity by output voltage in the rated
frequency range, dB
< 0,3
THD, % < 0.5
Rated input voltage, working value, V 3.5 ± 0.1
Amplification coefficient, dB 25.5 ± 0,5
Input resistance, kOhm > 200
Maximum output current, mA > 20
Polarization voltage «OUT +200V», V 200 ± 2
Polarization voltage «OUT+800V», V 800 ± 8
Supply voltage from an alternating current
network from 47 to 63 Hz, V
220 ± 22
Constant power supply, VA < 20
Dimensions, mm 390 × 274 × 77
Weight, kg 1.7
Technical Features VS-335
Frequency range of microphone FRF, Hz 20 ÷ 20000
Microphone FRF error in the rated
frequency range, dB
≤ ±0.3
Dimensions, mm 120 × 60 × 42
Weight, kg 0.3