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Description: Digitally generated CD for testing hearing in the 20Hz–20kHz frequency range.
Price: $39.95. Approximate number of catalog dealers: 4.
Manufacturer: Digital Recordings—Advanced R&D, 5959 Spring Garden Road, Suite 1103, Halifax, Nova Scotia B3H 1Y5, Canada. Tel./Fax: (902) 429-9622, (902) 425-1154. Web: www.digital-recordings.com.