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A feasibility study of predictable and unpredictable surf-like sounds for tinnitus therapy using personal music
Mithila Durai1, Kei Kobayashi1, Grant D Searchfield1
1a Section of Audiology , University of Auckland , Auckland , New Zealand.
Objective:
To evaluate the feasibility of predictable or unpredictable amplitude-modulated sounds for tinnitus therapy.
Design:
The study consisted of two parts. (1) An adaptation experiment. Loudness level matches and rating scales (10-point) for loudness and distress were obtained at a silent baseline and at the end of three counterbalanced 30-min exposures (silence, predictable and unpredictable). (2) A qualitative 2-week sound therapy feasibility trial. Participants took home a personal music player (PMP).
Study Sample:
Part 1: 23 individuals with chronic tinnitus and part 2: seven individuals randomly selected from Part 1.
Results:
Self-reported tinnitus loudness and annoyance were significantly lower than baseline ratings after acute unpredictable sound exposure. Tinnitus annoyance ratings were also significantly lower than the baseline but the effect was small. The feasibility trial identified that participant preferences for sounds varied. Three participants did not obtain any benefit from either sound. Three participants preferred unpredictable compared to predictable sounds. Some participants had difficulty using the PMP, the average self-report hours of use were low (less <1 h/day).
Conclusions:
Unpredictable surf-like sounds played using a PMP is a feasible tinnitus treatment. Further work is required to improve the acceptance of the sound and ease of PMP use.
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