Acoustical (adjective)

1. Of or relating to sound or the science of sound.
2. Designed for or related to the production, control, or transmission of sound.
3. Of or relating to the properties of sound that affect how it is perceived by the human ear.

Origin:

From acoustics + -al, from the greek akoustos ("heard"), from akouō ("i hear").

Examples:

1. The concert hall had excellent acoustical properties.
2. The acoustical engineer designed the sound system for the theater.
3. The acoustical tiles on the ceiling helped to reduce echo.
4. The acoustical performance of the room was poor.
5. He was an expert in acoustical design and had worked on several concert halls and auditoriums.