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TYPE 4941

HIGH-LEVEL SOUND PRESSURE MICROPHONE, EXT. POLARIZED

High Sound Pressure Microphone Type 4941 is designed for extremely high-level measurements such as gunshot, fireworks and rockets over the frequnency range of  4Hz to 20 kHz.

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TYPE 4941

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The robust construction of this pressure-field microphone allows it to sustain burst pressure up to 201 dB without damage. Being externally polarized, Type 4941 must be used with a classical preamplifier.

 

USE OF PREASSURE-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. Type 4941 is suited for all very high level measurements up to 20 kHz. If used in free-field conditions, Type 4941 should be used at 90 degrees angle of incidence and without the protection grid. Under these conditions, the free-field response will typically be better than 2 dB up to 20 kHz.

 

STABILITY

A laser-welded, extra thick and robust, stainless-steel diaphragm together with a special back-plate design ensure long-term stability and mechanical robustness

 

POLARIZATION VOLTAGE

Type 4941 requires an external polarization voltage and must therefore be used with a classical preamplifier. Externally polarized microphones may be used at higher temperatures without severe changes in sensitivity.

Type 4941 is available in a microphone set (TEDS microphone) with different classical preamplifiers. 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 in the transducer. The default TEDS template is to IEEE P 1451.4 but TEDS to IEEE 1451.4 is available on request.

USE SCENARIOS

  • Gunshot noise measurements
  • Fireworks noise measurements
  • Rocket noise measurements
  • General high-intensity measurements

File

Description

Type

Languages

Size

TEDS Microphones

Technical Document English 249 KB
Product Data: ¼-inch Pressure-field Microphone Type 4941

Product Data: ¼-inch Pressure-field Microphone Type 4941

Technical Document English 840 KB
TYPE 4941
Standard IEC 61094
Sound field Pressure field
Polarization voltage 200V
Sensitivity [mV/Pa] 0.09 mV/Pa
Lower limiting frequency 4 Hz
Higher limiting frequency 20 kHz
Inherent noise 59 dB(A)
Upper limiting of dynamic range 184 dB
Diameter 1/4 inch
Venting Side
Minimum Temperature [°C] -40 °C
Maximum Temperature [°C] 150 °C
Minimum Temperature [°F] -40 °F
Maximum Temperature [°F] 302 °F