TYPE 4180

½-inch laboratory standard microphones, 1 Hz to 20 kHz, 200V polarization

Designed for use as laboratory standard microphone.

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Types 4160 and 4180 are both high stability condenser microphones for laboratory standard applications and in coupler measurements.

USE SCENARIOS

  • Laboratory standard microphones
  • Pressure and Free Field Reciprocity Calibrations
  • Coupler measurements

FEATURES

  • Well defined integral front cavities for coupler calibrations
  • Low hydrogen leakage from front cavity
  • Well-defined operating characteristics
  • Flat Frequency Pressure Responses up to: 4160: 8kHz/4180: 20 kHz
  • Artificially aged for long term stability
  • Low sensitivity to environmental changes

Type 4160 has been used for some time in such applications and conforms to IEC 327 and 402, ANSI S1.12-1967 and ANSI Sl.lO-1966, JIS C 5515, and the current IEC draft standard for 1” laboratory standard microphones. It has become established as a high precision reference standard and is used in the medium frequency ranges and for measurements at low sound pressure levels.


Type 4180 has been developed to meet a growing need for a laboratory standard ½" microphone which enables measurements at higher frequencies and at higher sound pressure levels. It has been designed to comply with the most recent drafts of laboratory standard microphone standards. Types 4160 and 4180 are delivered with individual calibration charts.  
Capacitance
17.5 pF
Diameter
1/2
Dynamic range
18 – 160 dB
Frequency range
1 – 20000 Hz
Inherent noise
18 dB A
Lower limiting frequency -3dB
Hz
Optimised
Calibration
Polarization
Ext polarized
Polarization voltages
200 V
Pressure coefficient
-0.007 dB/kPa
Sensitivity
12.5 mV/Pa
Standards
IEC 61094-1 LS2P
TEDS UTID
Temperature coefficient
-0.002 db/ºC
Temperature range
-1 – 50 C
Venting
Rear
Weight
gram
Sound field
Special
Input type
Classic
Microphone type
Laboratory Standard