| 摘要 |
<p>The technology of active noise reduction is incorporated into audio-metry testing in a variety of formats. Analog feedback, digital feedback, adaptive feed forward, and adaptive feedback noise control schemes are presented for use in audio-metry to reduce the ambient noise heard by the test subject, allowing subject testing in higher ambient noise fields. Audiometer test signals are appropriately compensated so the test results are accurate, and comply with existing calibration so that active noise reduction can be accomplished while satisfying existing standards for audiometric testing. Audiometer (6) is used with headphone speaker (7) for testing the eardrum (10).</p> |
