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MEASURE all types of sound, check that LEGAL LIMITS
in factories and residential areas are met, compare lawn mowers, paper
shredders etc, measure the effect of sound proofing or double glazing.
HAND HELD self contained unit has "A" weighted frequency
response to compare both low and high frequency annoyance.
CALIBRATOR is built-in, linear measurement range from 40 dB (public
library) to 120 dB (overhead jet take-off).
PEAK sound response, even with pulsating or irregular sounds, just
set knob to dB, LED flashes when sound exceeded, or turn knob till LED
flashes and read dB, no flickering needle.
DATA output shows when dB exceeded, for computer. applause timing, "Wear
Ear Defenders" sign, intruder alarm, FLASH PHOTOGRAPHY, disco
lights, chart recorder etc.
DESIGNED to BS 5969, internal battery or 9 V at 20 mA, 4 x 7 x
14 cm, 300 g.
This fun-to-build kit used to include all parts, tinned drilled fibre-glass pcb, microphone, case, connectors, screws etc
as well as detailed assembly and operating instructions including circuit description and diagram,
and was priced at £32.90 including VAT and UK postage.
Please e-mail martincambridge@live.co.uk
for the latest price reduction, details of payment and any extra parts now neeeded.
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