This is the 7109th most frequent Catalan word.
acústic
Relating to sound or hearing.
Here, 'acústic' is used as an adjective to describe a type of concert characterized by acoustic instruments or sound.
El concert acústic serà demà al vespre.
The acoustic concert will be tomorrow evening.
In this sentence, 'acústica' is used as an adjective to specify the type of guitar, distinguishing it from electric guitars.
La guitarra acústica té un so moltric i clar.
The acoustic guitar has a rich and clear sound.
Here, 'acústiques' is used as an adjective related to sound properties, referring to the characteristics of the room's sound behavior.