专利名称：A HEARING TESTING DEVICE发明人：ESNOUF, PHILIP STUART申请号：EP05729501申请日：20050408公开号：EP1791468A4公开日：20080102
摘要：A hearing testing device (2) for self-testing the hearing of a subject including: anearpiece housing (4); a loudspeaker (46) located within the housing; and control circuitry(14) coupled to drive the loudspeaker, the control circuitry being arranged to produce asequence of test signals which are inputted to the loudspeaker to produce a series oftones at frequencies corresponding to said test signals wherein said test signals do notinclude significant harmonic components.
申请人：ESNOUF, PHILIP STUART
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