@swift
Yeah, even just a sip of a 5% beer could trigger FAS to the point where it'd be slightly visible in external features and have a large impact on the brain
@kuroww but only in 2 dimensions (with some difficulty of hearing front/back), we'd need 3 for 3D and either special geometry such as angled conical ears (i.e. bat/cat ears) or 4 ears to fully accurately determine the direction of a sound