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19th February 1960, Page 58
19th February 1960
Page 58
Page 58, 19th February 1960
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Determining Decibels

D V usin g transistors Dawe Instruments, LP Ltd., 99 Uxbrid g e Road, London, W.), have produced a self-contained sound level meter with overall dimensions of 81 in. by 5+ in.......