Those frequencies within the 200 to 6000 Hz area that are most important for hearing and understanding speech.

See Speech Awareness Threshold.

The lowest hearing level in decibels at which a person can detect the presence of speech. Also knows as the speech detection threshold (SDT).

An FM system that has a small loudspeaker near the listener to amplify the speaker’s voice. The speaker wears a wireless FM microphone. Sound field systems used in classrooms may have several loudspeakers focused on different parts of the classroom so all students can hear better.

A channel through the earmold where sound is received from the hearing aid and delivered to the ear canal.

See SensoriNeural Hearing Loss.