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4227 Bruel & Kjaer Vibration and Sound Used

4227 Bruel & Kjaer Vibration and Sound Used

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Additional Features:

  • Conforms to IEEE-269, IEEE-661 and ITU-T P.51.
  • Accurate level and frequency response calibration is easily done using a Brüel & Kjær ½" microphone placed in the supplied calibration jig
  • Accurate simulation of human voice field
  • Quality control testing of frequency response and distortion of telephone transmitters and close-talking microphones
  • Continuous SPL of 100dB 25mm from lip ring
  • Low distortion
  • Built-in overload protection circuit
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The Bruel and Kjaer 4227 is an accurate reference sound source developed for near field testing of telephone transmitters and microphones. It provides a standardised and realistic simulation of the human voice field.

Model No

4227

Condition

Used

Manufacturer

Bruel & Kjaer

Bruel_and_Kjaer_4227
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