treble increase at low levels
Also found in: Acronyms.
treble increase at low levels (TILL),
a signal-processing modality in hearing aids to increase amplification of high-frequency sounds gradually over that of low-intensity sounds.
tre·ble in·crease at low lev·els(treb'ĕl in'krēs lō lev'ĕlz)
A hearing aid signal-processing strategy to increase gradually the amplification of high-frequency sounds at low levels.