4192 1/2-Inch Pressure-Field Microphone
Type 4192 is designed for high-precision coupler measurements or ANSI noise measurements. Being externally polarized, Type 4192 must be used with a classical preamplifier.
- Precision coupler measurement
- Premium class ANSI sound level meters
- General random incidence measurements
USE OF PRESSURE-FIELD MICROHONES
Pressure-field microphones are optimised to have a flat frequency response in a pressure field. The microphones should be used for making measurements in small, closed couplers or close to hard, reflective surfaces.
Type 4192 is suited for situations where a robust and stable pressure-field microphone is required.
A press-fitted, stainless-steel diaphragm ensures superior long-term stability and mechanical robustness – Type 4192 will withstand the 1 m drop test of IEC 60068-2-32.
Type 4192 requires an external polarization voltage and must therefore must be used with a classical preamplifier. Externally polarized microphones may be used at higher temperatures without severe changes in sensitivity.
Type 4192 is available in TEDS combinations with the classical Microphone Preamplifier Type 2669. The TEDS microphone is considered one unit and has been sealed in a clean environment. The TEDS is programmed with the loaded sensitivity of the actual cartridge and the data is therefore readily available. The default TEDS template is to IEEE P 1451.4 but TEDS to IEEE 1451.4 is available on request.
Capacitance: 18 pF
Dynamic range: 19 – 162 dB
Frequency range: 3.15 – 20000 Hz
Inherent noise: 19 dB A
Lower limiting frequency -3dB: 2 Hz
Optimised: Pressure Field
Polarization: Ext polarized
Polarization voltages: 200 V
Pressure coefficient: -0.005 dB/kPa
Sensitivity: 12.5 mV/Pa
Standards: IEC 61094-4 WS2P
Temperature coefficient: -0.0045 db/ºC
Temperature range: -30 – 300 C
Sound field: Pressure-field
Input type: Classic
Microphone type: Pressure Field