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'Stethoscope'

15th October 1971, Page 64
15th October 1971
Page 64
Page 64, 15th October 1971 — 'Stethoscope'
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The fVlinophon, a pocket-si2 "stethoscopewhich can used to listen to the sound bearings and other equipment being marketed by Hird-Bro Electronics Ltd, of Lever Stre Bolton, Lancs.

The device weighs o 16.8oz with battery, has earphone attachment and can used to listen for noises J vibrations when testing mot( pumps, oil burners, ventilat( sound-absorbing materials, sound distribution in rooi Vibrations of a machine work correctly can be measured.

The Minophon's rai extends from 40 to 125 dB.

Accessories include an ex. sion microphone for noise II measurement in inaccess places, and for use in rooms.

Made by: Hird-Brown Lever Street, Bolton BL3