Interpretation of published earphone frequency response (john erdreich )

Subject: Interpretation of published earphone frequency response
From:    john erdreich  <acoustic(at)>
Date:    Thu, 26 Feb 1998 19:39:13 -0500

This is a question that should have an easy answer. Suprisingly, it seems not to. SONY specifies the frequency response of its headphones in terms of frequency range. Normally, I consider the response as within 3dB or less. However, I cannot find any info from SONY about what THEY consider the tolerance over the frequency range specified. Anyone know? Second question. How should we perform an ABSOLUTE calibration on a circumaural earphone such as the SONY V-6 or V-600? Using a mannikin does not offer a standard volume into which the earphone works. The B&K couplers which worked so well for the TDH-39/ MX41A combination will not work for most of the modern circumaural phones even with the flat plate adapter. Any calibration ideas? -- John Erdreich, PhD Ostergaard Acoustical Associates 200 Executive Dr W Orange, NJ 07052 Phone 973 731 7002 Fax 973 731 6680

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