Influence of background noise on iPod levels

In the latest issue of the International Journal of Audiology  (Volume 48 Issue 12 2009), an interesting article is published about the influence of background noises and exercise on the listening levels of iPod users.

The widespread use of portable listening devices (PLDs) has increased concern about the potential for hearing impairment caused by their use. The current study investigated the effects of external noise and exercise on the use of PLDs.

The 24 participants listened to the same song on an iPod during rest-in-quiet, rest-in-noise, and exercise-in-noise conditions. Preferred listening levels (PLLs) were recorded and participants’ maximum noise doses were calculated. Participants selected significantly higher listening levels in both noise conditions than in the quiet condition. The variability of volume selection was reduced significantly in the noise conditions. The maximum daily noise dose would have been exceeded by seven participants in the rest-in-noise condition and by eight in the exercise-in-noise condition compared to one participant in the rest-in-quiet condition.

These results indicated that increased background noise causes individuals to increase the volume on their PLDs to potentially dangerous levels and that increased noise alone was not the only factor affecting the participants as the addition of exercise induced even further increases in PLLs.

Authors: William Hodgetts, Ryan Szarko & Jana Rieger, Speech Pathology and Audiology Department, University of Alberta, Edmonton, Canada

Read the whole article in the International Journal of Audiology .