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Bruel and Kjaer 4227 Mouth
Location:
Elgin, IL
Manufacturer:
Bruel and Kjaer
Model:
4227

Specifications

Condition:
used
Condition info:
Refurbished

Description

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.
Bruel and Kjaer 4227 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