Category:Measuring instruments (hearing)

Media in category "Measuring instruments (hearing)"

The following 11 files are in this category, out of 11 total.

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  Vintage Acousticon Hearing Aid Gainmeter Model A-10, Dictograph Products Co., Two-Piece Unit, Visually Graphs A Hearing Aid's Performance, Circa 1960s (19773459422).jpg 2,656 × 2,722; 2.04 MB
  
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  Vintage Advertising For The Acousticon Hearing Aid Gainmeter Model A-10, Dictograph Products Co., The San Bernardino California County Sun, August 16, 1965 (19754595666).jpg 3,759 × 4,209; 1.4 MB
  
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  Vintage Eckstein Bros., Inc. Screening Audiometer, Tetra-Tone Model EB-46, Circa 1975 (16733399820).jpg 3,945 × 2,928; 3.25 MB
  
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  Vintage Eveready Hearing Aid Battery Checker For Spin Paks, Made In USA, Circa 1971 (42332121101).jpg 3,394 × 1,915; 1.29 MB
  
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  Vintage Hearing Aid Paper Weight Featuring Zenith Transistor Aids (15490915800).jpg 2,989 × 2,383; 2.56 MB
  
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  Vintage Maico Model F-1 Portable Audiometer Hearing Tester, Vacuum Tube Unit, Circa 1960s (15846553503).jpg 2,253 × 3,009; 2.53 MB
  
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  Vintage Maico Model F-1 Portable Audiometer Hearing Tester, Vacuum Tube Unit, Circa 1960s (16280400589).jpg 2,616 × 3,214; 2.18 MB
  
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  Vintage Sonotone Hearing Aid Battery Tester, Model AB-2 (14248576417).jpg 3,843 × 2,933; 3.02 MB
  
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  Vintage Starkey Binaural Equalizer, Fountain-Pen Size Tone Generator To Make Sure Hearing Aids Are Balanced Evenly (16385703477).jpg 4,123 × 2,275; 2.68 MB
  
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  Vintage Sterling No. 31A Hearing Aid Tester Voltmeter (14242571121).jpg 4,317 × 2,960; 5.3 MB
  
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  Vintage Sterling No. 44 Pocket Voltammeter, Made In USA (22306910276).jpg 3,723 × 2,422; 4.1 MB