subaudible.

1. Too faint to be heard under the relevant ordinary listening conditions.

2. Having a frequency lower than the usual lower boundary of human hearing.

Use it for

Words that belong together

• subaudible signal
• subaudible sound

On the page

The recorder detected a subaudible signal beneath the room noise.

A subaudible sound appeared on the sensor while the listeners heard nothing.

Usage notes

Primary category: sensory / description. Forms: Normally non-gradable as a threshold classification; specify level or frequency when relevant. Legacy lexical fields mirror sense 1 only. Use numbered sense fields for all meanings.