diacoustics

Century Dictionary and Cyclopedia

1. n. The science or doctrine of refracted sounds; the consideration of the properties of sound refracted by passing through media of different density. Also called diaphonics.

Wiktionary

1. n. The science concerned with the properties of sound as affected by passing through different mediums; diaphonics.

GNU Webster's 1913

1. n. That branch of natural philosophy which treats of the properties of sound as affected by passing through different mediums; -- called also diaphonics. See the Note under acoustics.