A proof of performance report is supplied with each B&K 4007 microphone. The sensitivity figure given at 250Hz is the figure that is used for the Sound Lab software Volts Per Reference Unit in the INPUT/CALIBRATION Menu. A figure of 2.76 will translate into .00276 for the Volts Per Reference Unit in the Menu.

The typical frequency response of the B&K 4007 is: 20Hz to 40kHz ±2dB up to 135dB SPL. The 4007 can typically handle levels of around 150dB SPL at 1% THD. The phase response of the microphone is quite flat + 2.5 degrees, even out to 30 plus kHz. The B&K 4007 has an internal noise floor that equates to around 24dB(A) SPL and is not suitable for measurements below NC 25 at best. The 4007 has a pin-2 positive polarity that matches the TEF20 input standard and is powered by the TEF20 internal 48 volt phantom power supply.

Frequency response - on axis (typical): 20 Hz to 40 kHz ±2dB.
Sensitivity: 2.5 mV/Pa.
Dynamic Range: 26 - 148dB
Maximum Level (peak): 155dB
Output connector: 3-pin male pro audio connector.
Power: 48V phantom power. The mic can be powered directly trom a TEF20 sound analyzer.
Dimensions: Ø12 x 245mm.