1/2" Infrasound / Low-frequency Microphone, Ext. Polarized

Low-frequency Microphone Type 4193 is designed for infrasound measurement, for example in ship engine rooms, in helicopters and in wind-buffeted buildings, due to its extremely low cut-off frequency.

When used with infrasound adaptor UC-0211, the lower limiting frequency of the preamplifier is reduced to 0.1 Hz.

USER SCENARIOS

• Infrasound (infrasonic) measurements
• Sonic boom measurements
• General pressure field measurements

USE OF PRESSURE-FIELD MICROPHONES

Pressure-field microphones are optimised to have a flat frequency response in a pressure field. Pressure-field microphones should be used for making measurements in small, closed couplers or close to hard, reflective surfaces.

STABILITY

A press-fitted, stainless-steel diaphragm ensure superior long-term stability and mechanical robustness – Type 4193 will withstand the 1 m drop test of IEC 6006-2-32.

POLARIZATION VOLTAGE

Type 4193 requires an external polarization voltage and must therefore must be used with a classical preamplifier. External polarized microphones may be used at higher temperatures without severe changes in sensitivity.

TEDS MICROPHONES

Type 4193 is available in TEDS combinations with the classical 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.