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The Crossed Acoustic Response and Objective Tests of Hearing

Objective tests of hearing now have a recognised rôle in the assessment of children. Three types of responses can be used for this purpose, the cortical responses (evoked response audiometry), the brain‐stem responses (crossed acoustic responses) and the cochlear responses (electrocochleography). The crossed acoustic test is a new development, and its main virtues are that it can be easily and simply applied to all children, even when there is some active resistance, without recourse to sedation or anaesthesia. The preliminary results have been encouraging and suggest that it can be used as a screening test during the clinic.