VU (Volume Units) meter
Date1930-1950
Inventory NumberWJ1276
ClassificationSound level meter
Subject
Maker
Triplett
founded 1904
User
Psycho-Acoustic Laboratory, Harvard University
?
1940 - 1962
User
Department of Psychology, Harvard University
founded 1934
Cultural Region
Place of Origin
Place of Use
Dimensionsbox - without lid: 6.8 × 10 × 10 cm (2 11/16 × 3 15/16 × 3 15/16 in.)
9 × 9 × 5.5 cm (3 9/16 × 3 9/16 × 2 3/16 in.)
9 × 9 × 5.5 cm (3 9/16 × 3 9/16 × 2 3/16 in.)
Material
Accessoriesplain cardboard box fitted for this meter; small sealed envelope of hardware
DescriptionTriplett Model 321 (rectifier type) VU meter for measuring signal level (loudness). The scale is calibrated from -10 to 6 decibels.
In a plain cardboard box fitted for this meter, which also contains a small sealed envelope of hardware.
In a plain cardboard box fitted for this meter, which also contains a small sealed envelope of hardware.
Signeddial reads: -DECIBELS+/RECTIFIER TYPE/TRIPLETT/MODEL NO./321/PAT. NO./1,963,283/TRIPLETT ELEC. INST.CO.BLUFFTON,OHIO,U.S.A.
Curatorial RemarksProbably used in the Psycho-Acoustic Laboratory. See inscriptions on instrument WJ1288.
FunctionQuatifies the intensity of sound, in decibels.
ProvenanceFrom William James Hall, Harvard University.
Weston Electrical Instrument Corporation
Date: 1940-1960
Accessories: original cardboard box; small sealed envelope of hardware
Object number: WJ1277
Weston Electrical Instrument Corporation
Date: 1940-1960
Accessories: original cardboard box
Object number: WJ1273
Weston Electrical Instrument Corporation
Date: 1940-1960
Accessories: cardboard box (uncertain if original)
Object number: WJ1275
Weston Electrical Instrument Corporation
Date: 1940-1960
Accessories: original cardboard box
Object number: WJ1272
General Radio Company
Date: 1960-1970
Accessories: operation manual
Object number: 1999-1-0055
Triplett
Date: 1930-1960
Accessories: cardboard box (not original, WESTON)
Object number: WJ1266
General Electric Company
Date: 1945-1960
Accessories: cardboard box; small sealed envelope of hardware
Object number: WJ1281
General Electric Company
Date: 1945-1960
Accessories: original cardboard box; small sealed envelope of hardware
Object number: WJ1297
Westinghouse Electric & Manufacturing Company
Date: 1890-1930
Object number: RS0517
Central Scientific Company
Date: circa 1950
Accessories: steel French meter standard (1998-1-0295a); iron clamp stands (1998-1-0295c, d)
Object number: 1998-1-0295b