Self-running and self-administered pure tone audiometry

DuoTone®, the hearing assessment protocol included in Jacoti HearingKit®, tests pairs of pure-tone stimuli at different frequencies along with an additional silent condition. Pure-tones thresholds are determined from 125Hz up to 12000Hz. The procedure accurately reports hearing thresholds for both frequencies of the pure-tone stimuli pair.

Patent: EP2572640B1

3 types of stimuli

  • A continuous tone with the lower frequency
  • An intermittent tone, three short tones, with the higher frequency.
  • No signal (“silent” stimulus).

The test comprises several consecutive trials with pairs of stimuli from this list. For example, a trial might consist of a 500Hz continuous tone (stimulus A) and a 3kHz intermittent tone (stimulus B). Another trial might consist of a 1 kHz continuous tone (stimulus A) and the silent stimulus (stimulus C).

The role of “silent” stimulus

The subject is informed that there are silent stimuli. When one of the two stimuli (A) or (B) are delivered at an intensity level below the individual’s threshold, he will not guess between (A) and (B) but select (C).

DuoTone® procedure was developed with the intention of having a procedure that runs independently from direct control by a test leader.

DuoTone® has been demonstrated to be a valid procedure to measure pure tone hearing thresholds. No statistically significant difference was found between the standard clinical procedure in a soundproof booth and a DuoTone® test performed in a quiet environment.

Report on Antwerp Study: DuoTone® validation
Jacoti duotone hearing test screen

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Call for interest to researchers and research centres

Jacoti is interested in setting up cooperation and collaborative research with researchers and research centres to generate further development. If you are interested in being part of the new field of consumerisation of hearing technology, please contact us.

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