acoustics acoustics /əˈkuːstɪks/

noun

1. The study of the physical properties of sound  ( acoustics )
   the study of the physical properties of sound
    The acoustics of the concert hall were impeccable.
   The acoustics of the concert hall were impeccable.
   
   

 acoustic acoustic /əˈkuːstɪk/

adjective

1. Of or relating to the science of acoustics  ( acoustic , acoustical )
   of or relating to the science of acoustics
    Acoustic properties of a hall
   acoustic properties of a hall
   

noun

1. A remedy for hearing loss or deafness  ( acoustic )
   a remedy for hearing loss or deafness