Appeal No. 2000-1526
Application No. 08/902,196
using a magnetic-to-electric transducer and an electric-to acoustic transducer, along
with appropriate processing circuitry between the two transducers, in order to test a
magnetic hearing device including a magnetic drive unit having a specified drive
characteristic.
Representative independent claims 31 and 45 are reproduced as follows:
31. A test apparatus for testing a magnetic hearing device including
magnetic drive unit having a specified drive characteristic, the apparatus
comprising:
a housing;
a first magnetic-to-electric transducer;
a second electric-to-acoustic transducer; and
signal processing circuitry coupling the first transducer and the
second transducer;
wherein the combination of the first transducer, the second
transducer and the signal processing circuitry realizes a
magnetic-to-acoustic transducer that produces a calibrated acoustic
output such that different ones of the test apparatus produce substantially
identical test results.
45. Test apparatus for a magnetic drive hearing device, including a drive
coil for driving an ear lens magnet removably affixed to the ear drum of a
wearer, the test apparatus comprising:
an acoustic chamber;
2
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