
1) Audiometer 2) Measuring device 3) Measuring instrument 4) Measuring system
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https://www.crosswordclues.com/clue/sonometer

1) Audiometer
Found on
https://www.crosswordclues.com/clue/sonometer

A sonometer is an apparatus made of a hollow box having two holes. A string is attached to it by which the transverse vibrations of strings can be studied. It is also called the monochord because it often has only one string. On the wooden rectangular box are two fixed bridges, near the ends, and at one end is a pulley. A string,wire is fastened a...
Found on
http://en.wikipedia.org/wiki/Sonometer

• (n.) An instrument for exhibiting the transverse vibrations of cords, and ascertaining the relations between musical notes. It consists of a cord stretched by weight along a box, and divided into different lengths at pleasure by a bridge, the place of which is determined by a scale on the face of the box. • (n.) An instrument for testin...
Found on
http://thinkexist.com/dictionary/meaning/sonometer/

1. <physiology> An instrument for exhibiting the transverse vibrations of cords, and ascertaining the relations between musical notes. It consists of a cord stretched by weight along a box, and divided into different lengths at pleasure by a bridge, the place of which is determined by a scale on the face of the box. ... 2. <instrument> ...
Found on
http://www.encyclo.co.uk/local/20973
So·nom'e·ter noun [ Latin
sonus a sound +
-meter .]
1. (Physiol.) An instrument for exhibiting the transverse vibrations of cords, and ascertaining the relations between musical notes. It consists of a cord stretched by weight along a box, and divided into different lengths...
Found on
http://www.encyclo.co.uk/webster/S/144

audiometer, sonometer 1. An instrument for measuring hearing activity for pure tones of normally audible frequencies. 2. An instrument that generates sounds of known frequency and intensity; used to measure an individual's hearing ability; especially, the level at which a sound becomes audible at a given frequency.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1302/5
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