| 摘要 |
A portable wireless hearing testing device, the device including: left and right earpieces connected together by a headband and arranged as headphones; the left and right earpiece each including an earpiece housing shaped to surround the left and right ears of a subject respectively to substantially prevent ambient sounds reaching the ear of the subject; left and right loudspeakers located within the left and right earpiece housings respectively; and control circuitry located within the left and/or right earpiece housings and coupled to drive the loudspeakers, the control circuitry being arranged to produce left and right test signals which are applied to the left and right loudspeakers respectively, the test signals being operative to cause the left and right loudspeakers to provide a respective series of tones at frequencies corresponding to the test signals and wherein the test signals do not include significant harmonic components of the tones.
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