A study of mercuric oxide and zinc-air battery life in hearing aids.
The requirement to phase out mercuric oxide (mercury) batteries on environmental grounds has led to the widespread introduction of zinc-air technology. The possibility arises that high drain hearing aids may not be adequately catered for by zinc-air cells, leading to poor performance. This study investigated the hearing aid user's ability to perceive differences between zinc-air and mercury cells in normal everyday usage. The data was collected for 100 experienced hearing aid users in field trials. Users report 50 per cent greater life for zinc-air cells in high power aids and 28 per cent in low power aids. The average life of the zinc-air cells range from 15 days in high power to 34 days in low power aids. Users are able to perceive a difference in sound quality in favour of zinc-air cells for low and medium power aids. The hearing aid population is not disadvantaged by phasing out mercury cells.
Sparkes
C
C
Department of Audiology, Glan Clwyd Hospital, Bodelwyddan, Denbighshire, UK.
Lacey
N K
NK
D004209:Disposable Equipment / Q000592:standards*; D011211:Electric Power Supplies / Q000592:standards*; D004867:Equipment Design; D005069:Evaluation Studies as Topic; D006310:Hearing Aids; D006801:Humans; D017669:Mercury Compounds; D010087:Oxides; D018709:Statistics, Nonparametric; D015032:Zinc
D017669:Mercury Compounds; D010087:Oxides; C019468:mercuric oxide; D015032:Zinc