Tinnitus masker The ear has a resonance frequency (highest frequency response) at 3,000hz and rolls off at a very steep 26db/octave on the high frequency side. Unfortunately, most tinnitus is associated with hearing loss, and most hearing loss and tinnitus is high frequency. Most maskers are limited to about 6khz of effective output. Higher frequency output results in increasing distortion, and may cause rejection of the device. The minimum masking level (MML) is the minimum amplitude of narrowband noise centered on the tinnitus pitch (or frequency range) necessary to completely mask the tinnitus. Tinnitus maskers are commonly used by tinnitus sufferers when
Tinnitus retraining therapy TRT is imputed to work by interfering with the neural activity causing the tinnitus at its source, in order to prevent it from spreading to other nervous systems such as the limbic and autonomic nervous systems. Clients are classified into 5 categories. These categories are numbered 0 to 4, and based on whether or not the patient has tinnitus with hearing loss, tinnitus with no hearing loss, tinnitus with hearing loss and hyperacusis, and tinnitus with hearing loss and hyperacusis for an extended amount of time. The first component of TRT, directive counseling, may change the way tinnitus is perceived.