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TYPE 4950

1/2"-FREIFELDMIKROFON, VORPOLARISIERT

Freifeldmikrofon für genaue Schallmessungen (IEC 61672 Klasse 1 und ANSI S 1.4 Typ 1) über einen Frequenzbereich von 6,5 Hz bis 16 kHz.

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TYPE 4950

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Dieses vorpolarisierte ½-Zoll-Freifeldmikrofon wurde speziell für Geräte entwickelt, die für genaue und zuverlässige Schallmessungen gemäß IEC 61672 Klasse 1 und ANSI S 1.4 Typ 1 vorgesehen sind.

  • Schallmessungen gemäß IEC 61672 und ANSI S 1.4 — 1983
  • Kostengünstige Schallmessungen
  • ideal für kostengünstige, tragbare Instrumente, die für den Einsatz unter verschiedenen Bedingungen, einschließlich feuchter und verschmutzter Atmosphären, vorgesehen sind.
TYPE 4950
Standard IEC 61672
Sound field Free field
Polarization voltage 0V
Sensitivity 50 mV/Pa
Lower limiting frequency 6.5 Hz
Higher limiting frequency 16 kHz
Inherent noise 15 dB(A)
Upper limiting of dynamic range 142 dB
Diameter 1/2 inch
Venting Rear
Minimum Temperature -30 °C
Maximum Temperature 100 °C
Minimum Temperature -22 °F
Maximum Temperature 212 °F

½-inch Free-field Microphone Type 4950 is a prepolarized condenser microphone, designed for accurate and reliable sound measurements as required for sound level meters in accordance with IEC 61672 Class 1 and ANSI S 1.4 Type 1. 

The use of a stainless-steel, press-fit mounted diaphragm guarantees both robustness and corrosion resistance. The microphone is fitted with a removable protection grid. It does not need an external polarization voltage, thus eliminating the need for cumbersome high-voltage DC supplies and at the same time enabling the use of inexpensive 2-wire system (CCLD) input.

The microphone is rear-vented in order to balance out the static pressure; the venting also determines the lower limiting frequency. Type 4950 comes with a calibration chart showing typical frequency response and individual sensitivity value.