Acoustic transfer characteristics in human middle ears studied by a SQUID magnetometer method

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Abstract
The middle‐ear transfer characteristics for sound in 14 human temporal bones were determined using a SQUIDmagnetometer method. With this method, the cochlea and middle ear remain intact. Postmortem changes were studied using a guinea pig. The mass‐loading effects of the applied magnets were determined and were found to be negligible. The mean umbo displacement was equal to the mean of six other studies. Lever ratios varied between the individual temporal bones and as a function of frequency.

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