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TYPE 4178

1/4" SOUND INTENSITY MICROPHONE PAIR, EXT. POLARIZED

Sound Intensity Microphones specially designed for high level and high frequency measurements over a frequency range of 4 Hz to 100 kHz,  with broadband matching of phase responses.

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TYPE 4178

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Type 4178 consists of a pair of selected Type 4939 1/4-inch microphones, whose phase responses are matched between 100 Hz and 20 kHz.

  • Measurement of sound intensity using the two-microphone technique, following IEC 61043 Class 1
  • Sound power measurements following ISO 9614-1, ISO 9614-2, ECMA 160, and ANSI S12.12, using sound intensity probes
  • Measurement of particle velocity of sound sources