I am one of millions of people who suffer from hearing loss. For my entire life I’ve known the frustration of asking people to repeat themselves, struggling to communicate over the phone, and skipping social events because I know they’ll be too noisy. Hearing aids do help, but they don’t work well in the noisy, crowded situations where I need them the most. That’s why I decided to devote my PhD thesis to improving the performance of hearing aids in noisy environments.
As my research progressed, I realized that this problem is not limited to hearing aids, and that the technologies I am developing could also help people who don’t suffer from hearing loss. Over the last few years, there has been rapid growth in a product category that I call augmented listening (AL): technologies that enhance human listening abilities by modifying the sounds they hear in real time. Augmented listening devices include:
- traditional hearing aids, which are prescribed by a clinician to patients with hearing loss;
- low-cost personal sound amplification products (PSAPs), which are ostensibly for normal-hearing listeners;
- advanced headphones, sometimes called “hearables,” that incorporate listening enhancement as well as features like heart-rate sensing; and
- augmented- and mixed-reality headsets, which supplement real-world sound with extra information.
These product categories have been converging in recent years as hearing aids add new consumer-technology features like Bluetooth and headphone products promise to enhance real-world sounds. Recent regulatory changes that allow hearing aids to be sold over the counter will also help to shake up the market.