Model: TS6440

Special Features:

Output sound pressure levels: 74, 84, 94, 104, 114 db; actual output frequency: 125.9, 251.2, 501.2, 1000.0, 1995.0, 3981.0 hz porm 3 pct; portable; dust and moisture proof; enclosed in plastic case except for test cavity; 8 hour min. Operation; battery test: internal circuitry check, automatic shutdown when voltage is too low; operating temperature: m10.0/p50.0 deg. C; microphone coupling: transducer cavity accomodates the following 1 in. Microphones (not included): electret condenser pn's gr1961 and 1971; western electric pn 640aa; toko rika pn mr103

Properties:

An item that, when used with an associated audio frequency signal generator, determines by comparison the output level of an audio frequency voltage. The meter is marked in volts or submultiples thereof. For items utilizing a meter the scale of which is marked in decibels or comparable units, and which do not require a driving oscillator, see meter, audio level. See also meter, modulation and meter, s-units.