Levitt, H Reduction of observer bias in reading speech levels with a VU meter. [electronic resource] - The Journal of the Acoustical Society of America Jun 1970 - 1583-7 p. digital Publication Type: Journal Article ISSN: 0001-4966 Standard No.: 10.1121/1.1912091 doi Subjects--Topical Terms: HumansMethodsPhysiology--instrumentationSpeechTape Recording