Bay Systems Ltd

Bay Systems Microphones

Microphones | Radio Link | Wind Noise | Tyre Cavity Microphone

Microphones

The microphones and pre-amplifiers offered are designed to fill an obvious gap that exists in the microphone market today.

Laboratory grade microphones with their associated pre-amplifier are available from reputable sources and usually have the following features: -	The real world is a far different environment to the laboratory and the BAY SYSTEM Microphones are suitable for this more robust environment : -
1. The assembled microphone capsule and pre-amp will be quite heavy typically weighing 100g and be 7 cm long. Supporting it requires care and a robust clamp.	1. Attach the 5 gram microphone using a tie clip.
2. It will be corrected for diffraction and other effects and be ideal for one of the following conditions : - Free field, Diffuse field or pressure field. Usually you can use the microphone, with suitable correction in any environment.	2. The microphone is set up for a diffuse field and this is what most rooms and cabins are.
3. They are expensive > $1000	3. The microphone costs < $200 and the pre-amp a similar amount and it is separated from the microphone by 3 metres of thin light cable. This means that the microphone can be replaced for $200.
4. They do not like to get wet	4. Soak the microphone in a bucket of water; dry it with a hair dryer and it will be working fine.
5. They do not like to get hot > 50 deg C.	5. It will work to specification to 60 degrees C and will still work at 125 degrees but be 3 dB out. It will recover from being exposed to 125 degrees and work normally.
6. They are very accurate.	6. Frequency response is flat to +/- 1 dB from 40Hz to 10kHz and +/- 5dB 20Hz to 20kHz. Most mechanical noise is within the 40 to 10kHz band and most results are quoted with a weighting factor. This means that even though the Bay microphone is not in theory suitable as a microphone for use with a Class 1 sound level meter the results obtained for overall A weighted level will be identical in 99% of cases.
7. They are normally required to be inspected and given a broad range frequency calibration annually.	7. No inspection or calibration is necessary as there is no delicate diaphragm to damage.
8. You normally calibrate them before use with a calibrator costing approximately $500	8. The calibrator costs a little less but not much though it will do the BAY, 1”, ½” and ¼” microphones.