Hearing aids are miniature signal-processing sound systems that must secure adequate signal-to-noise ratio

Evidence

A hearing aid (Dillon, 2012) is basically a miniature sound reproduction system with signal processing. Its purpose is to amplify and process sound for the user to compensate for the effects of a hearing impairment. The eventual aim is to enhance the hearing and communication performance of the user. A challenge in hearing-aid design is to achieve a suitable type of amplification that takes into account individual needs in different listening scenarios. Ensuring an adequate SNR for the user is essential. — Ville Pulkki, Matti Karjalainen, Communication Acoustics- An…, 2729

Categorization

• DEFINE: Frames a hearing aid as a miniature signal-processing reproduction system, with SNR as the central design constraint.
• XREF: Connects to the reader’s existing work on acoustics and soundscape — SNR as design target parallels the emphasis on signal-versus-noise throughout.