Ear potential that is transmitted along the spiral ganglion, which sends information through the auditory portion of the vestibulocochlear nerve to the temporal lobe of the brain. The human ear can generally hear sounds with frequencies between 20 Hz and 20 kHz (the audio range). Sounds outside this range are considered infrasound (below 20 Hz) or ultrasound (above 20 kHz) Although hearing requires an intact and functioning auditory portion of the central nervous system as well as a working ear, human deafness (extreme insensitivity to sound) most commonly occurs because of abnormalities of the inner ear, rather than in the nerves
Australian and New Zealand television frequencies allocation issue was not fixed until the late 1990s, when the FM band was expanded to the standard full 20 MHz block. As of the mid-2010s NZ totally abandoned its VHF band for UHF channels above 25. There is a frequency offset for many DTV channels between Australia and NZ, because of historical reasons relating to the introduction of PAL. DVB-T channel allocation note Table notes : Text in "italics" means these frequencies are not currently used but set aside as a Guardband or for future use. The ABC has the highest number of transmission sites: often, but not always,