акустичен означава в английски

acoustic▼(pertaining to hearing or the science of sounds)
adjective
[UK: əˈk.uː.stɪk] [US: əˈk.uː.stɪk]

phonic▼adjective
[UK: ˈfɒ.nɪk] [US: ˈfɑː.nɪk]