Use BILSOM 303 disposable noise protectors.
WELCH-ALLYN hand-held combined otoscope and audiometer;the AUDIOSCOPE 3 screening audiometer,(includes 4,000 Hz.)
Biophysicist,(Nobel Prize 1961),Geog von BEKESY,(1899-1972),patient- controlled AUTOMATED AUDIOMETER is easy to use in Primary practice. Eliminates any language problem and false patient response.
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