Englishfor English speakers
acoustic
Adjective
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Related to hearing or sounds.
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An acoustic instrument is played without electricity.
I think music from an acoustic guitar is prettier than music from an electric guitar.
acoustic
Noun
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If a space has good acoustics (or sometimes acoustic) its physical structure makes it easy to hear sound in it.
She hated singing in the gym because of the poor acoustics.
insulation
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noun
the state of being isolated or detached
the insulation of England was preserved by the English Channel
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noun
the act of protecting something by surrounding it with material that reduces or prevents the transmission of sound or heat or electricity
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noun
(= insulating material)
a material that reduces or prevents the transmission of heat or sound or electricity