The Sound Amplifier app for Android lets you reduce noise, amplify quiet sounds, and boost high or low frequencies, and you can apply different settings to each ear.

Armed with audio-beacon and smart app engine technology, Cincinnati-based startup LISNR has capitalized on this extra limb by providing consumers with triggered content via their smartphone that ...

An in-ear gadget that doubles as a Bluetooth headset can be customized to your distinct hearing profile to amplify sound and drown out background noise.