Ballantine Calibration Microphone
date: label: date made
content: 1930
label: associated date
content: 1930
name: label: associated institution
content: Ballantine Laboratories, Inc.
label: maker
content: Ballantine Laboratories, Inc.
notes: label: Description
content: Ballantine Laboratories Condenser Microphone with tripod. REF: Contributions from the Radio Frequency Laboratories No. 18. Stuart Ballantine; "Effect of Cavity Resonance on the Frequency Response Characteristic of the Condenser Microphone" (April 15, 1930).
label: Location
content: Currently not on view
place: label: place made
content: United States: New Jersey
setName: label: See more items in
content: Work and Industry: Electricity
creditLine: label: Credit Line
content: from Ballantine Laboratories, Inc. thru A. W. Parkes
dataSource: label: Data Source
content: National Museum of American History
identifier: label: ID Number
content: EM.327982
label: catalog number
content: 327982
label: accession number
content: 269371
objectType: label: Object Name
content: Microphone
label: Object Name
content: condenser microphone
label: Other Terms
content: Microphone; Audio Devices
physicalDescription: label: Measurements
content: closed: 41 in x 9 in x 10 in; 104.14 cm x 22.86 cm x 25.4 cm