EARPHONES Earphones are generally used to test pure tone AC thresholds. Supra-aural earphones, ones in which the cushion rests on the pinna, were the only choice for clinical audiology. The popularity of supra-aural phones was mainly due to their ease of calibration and the lack of other types of commercially available earphones. In the past few years, insert earphones and circumaural earphones have become available and provide some useful applications for puretone assessment.#worldhearingday#hearingaidtrial#dugri#ludhiana#nakodar#malerkotla#digitalhearingaid#punjab
