B&K 4232 Anechoic Test Box
Description
The B&K Anechoic Test Box is an acoustically shielded
chamber which allows for acoustic devices to be tested
in a low noise environment. The B&K Anechoic Test Box
includes a loudspeaker for testing microphones as well
as connectors for reference microphones. A conditioning
amplifier is also included with the system for
amplification of the electrical signal produced by the
B&K microphone. Labview programs have been set up to
control power supplies, function generators and
oscilloscopes for frequency response measurements.
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Usage Policy
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Contact
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Qualified Users List
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Office |
Extension |
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Brett Diamond |
Akustica |
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Standard Operating Procedures
- Turn on power to Nexus Conditioning Amplifier (red circle with
green line inscribed).
- Use arrow keys to switch channels and to control the output levels.
- Make sure that the channel which is connected to the microphone to be
used is set to the lowest amplification (i.e. Out = 100mV/Pa). This
ensures that the microphone will not be saturated when the anechoic box
is opened.
- Open the anechoic test box by turning the large handle (you will
feel a click thus disengaging the locking mechanism). Close it when it is
not in use.
- Make sure that all electrical wires connected to your device are
away from the locking mechanism and close the lid. There is a soft
spot on the left that can be indented so you can run wires under the
edge of the lid. (It is recommended that you use thin wires to make
electrical connection between your device and any power supplies/function
generators).
- Adjust the output of the Nexus Amplifier using the arrow keys
until desired level is reached. An overload light will indicate too
high of amplification.
- When finished turn the output of Nexus amplifier to 100mV/Pa and
remove your device. Close lid of anechoic chamber and turn off power to Nexus
Conditioning Amplifier.
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Application Notes
Keep lid shut when not in use.
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Useful Links
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Miscellaneous
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