The 4227 is vibration and sound equipment from Bruel & Kjaer.
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
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.
The 4227 is vibration and sound equipment from Bruel & Kjaer.
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
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.
