B&K 4232 Anechoic Test Box

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.

 ... to top


Usage Policy

 ... to top


Contact

Name Office Extension Email
       

 ... to top


Qualified Users List

Name Office Extension Email
Brett Diamond Akustica    
       
etc.      

 ... to top


Standard Operating Procedures

  1. Turn on power to Nexus Conditioning Amplifier (red circle with green line inscribed).
  2. Use arrow keys to switch channels and to control the output levels.
  3. 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.
  4. 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.
  5. 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).

  6. 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.
  7. 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.

 ... to top


Application Notes

Keep lid shut when not in use.

 ... to top


Useful Links

 ... to top


Miscellaneous

 ... to top



overview | projects | people | publications | intranet | resources         © 1998-2009  Carnegie Mellon