Sound meter

16th September 1966, Page 105

16th September 1966

Page 105

Page 105, 16th September 1966 — Sound meter

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pARTICULARLY suitable for use as portable instrument for checki noise levels by the roadside or in a depot pocket-size sound-level meter of Sw origin is to be marketed in this country Hird-Brown Ltd. The meter is known as Minophon and is claimed to be the small, instrument of its type available, its dim( sions being 5 in. x 3.5 in. X 1.5 in. Inch ing the battery it weighs 1 lb.

The Minophon has a sound-measuri range of 40/125 dB in four quickly-adjustal steps, with a frequency range of 50/12,5, Hz. As the unit is fully transistorized, warming-up time is required. Accessor include an additional microphone, earphoi vibration pick-up, tripod clamp and leaf} carrying case.

Made by: Hird-Brown Ltd., Flash Stre Bolton, Lancs.