ETYM French acoustique, Greek akoustikos relating to hearing, from akouein to hear.
Of or relating to the science of acoustics; SYN. acoustical.
Pertaining to the hearing, to sound and its transmission; worked by sound or echoes.

ETYM Latin resonans, p. pr. of resonare to resound: cf. French résonnant. Related to Resound.
1. Characterized by reverberation; SYN. resonating, resounding, reverberating, reverberative, rolling.
2. Inducing resonance.

ETYM Latin sonorus, from sonor, -oris, a sound, akin to sonus a sound. Related to Sound.
1. Giving sound when struck; resonant.
2. Giving an impressive, low, clear sound.
3. Yielding sound; characterized by sound; vocal; sonant.
4. Impressive in sound; high-sounding.