<unk>  is used in tinnitus maskers to suppress annoying ringing, hissing, or buzzing or tinnitus often associated with hearing loss. It is also used in various kinds of audiometry, including pure tone audiometry, and the standard hearing test to test each ear unilaterally and to test speech recognition in the presence of partially<unk>  noise.<unk>  is exploited to perform data compression for sound signals (MP3).
Auditory masking
Audio-visual entrainment
Binocular rivalry
Fusional vergence
Scotopic vision
Auditory exclusion
Retinal summation
Photopic vision