Free app turns phone into a hearing aid

Researchers at Essex University have developed a free mobile app that turns an iPhone or iPod into a hearing aid.

The BioAid app is said to replicate the complexities of the human ear, unlike standard hearing aids that amplify all sounds.

BioAid, which is available on iTunes, has been developed by Prof Ray Meddis of Essex’s Department of Psychology with Nick Clark, formerly a Research Officer in the Department and Dr Wendy Lecluyse of University Campus Suffolk.

According to its developers, BioAid is a multi-channel device where sounds are input through the mobile device’s microphone and then filtered into frequency bands. Each band is processed separately and the output from each channel is combined to make the output that is delivered to the device’s earpieces.

Unlike standard aids that have a single setting, BioAid has six fixed settings each of which has four fine-tuning settings allowing the user to find the perfect match for their impairment.

In a statement, Prof Meddis said, ‘People with hearing impairment very often withdraw from public life. Even if they have a hearing aid, the technology is not sophisticated enough to offer a tailor-made solution to their impairment and in many cases people simply stop using them.

‘Sounds are a complicated mixture of different frequencies and hearing loss is usually a loss of sensitivity to some but not all frequencies. Standard hearing aids amplify some frequencies more than others but BioAid is different because it also compresses the very loud sounds that can make social situations like going to the pub, cinema or a birthday party intolerable.’

Clark added, ‘The mobile phone is a great platform for rapidly transferring hearing aid technology from the laboratory to the hands of the public. Standard hearing aids…are only dispensed by a professional after a hearing test. BioAid offers a simple alternative…The hearing test is replaced by an exploratory process, allowing users to find which setting works best for them. In the short term, people unsure about visiting a hearing care professional might be swayed to do so by BioAid, which can only be a good thing.’

As phones get smaller and technology continues to advance, the researchers believe the BioAid project has the potential to radically change the future of hearing devices.

Professor Meddis said, ‘With the BioAid algorithm and wi-fi technology, we could see dispensers able to remotely adjust the settings on a phone-based aid and even monitor use to ensure the user is getting the most out of it.’

The development of BioAid, which has been funded by the EPSRC and hearing technology manufacturer Phonak, is part of a research project to influence the future of hearing aids.

The researchers say they are keen to hear about people’s experiences using BioAid so that they can continue to perfect the technology. Click here for more information.