![]() A low resolution front end with a low or high stimulation rate produces a low resolution signal output.HiRes delivers the full sound signal while avoiding the SAS limitations, because the signal is delivered in separated pulses that avoid crosstalk currents.Therefore, SAS is tied to electrode proximity and is limited to a segment of the user population.SAS delivers all channels simultaneously, creating current summation (crosstalk), unless there is tight neural coupling. ![]() The high rate of stimulation allows the nerves to fire most similar to the normal nerve patterns, such that neuron firing follows the modulated signal, rather than the stimulation pulse rate.HiResolution is delivering sound in a stimulation strategy that contains more accurate frequency information than SAS, in a pulsatile stimulation form, at extraordinary rates.The stimulation delivery allows the auditory nerves to fire most similar to that in normal hearing (firing with signal patterns as opposed to pulse rate).Contains more detailed information than SAS The HiResolution Processing is delivered in a stimulation strategy that:.NEXT: Therefore, when stimulating at a high rate, the original sound information can be accurately recreated.With high resolution, actual original acoustic waveform is digitized.No matter how fast Nucleus stimulates, unless they improve the front end resolution, they cannot produce high resolution sound information. The resolution of the system is determined by the front end processing capability including the filtering system, which in HiResolution, is 5800Hz, as opposed to Nucleus which is around 250Hz.NEXT: But even if you stimulate at a high rate, the low resolution outline has already blurred the information from two sounds, and the acoustic environment cannot be recreated accurately with stimulation.NEXT: Stimulating at a low rate on the back end will clearly not include the complex combined waveform changes.NEXT: In a low resolution processing system, only the outline is extracted, losing the detail and zero crossings that distinguish components of the signal.If two frequencies within a single band or electrode make a complex waveform, like two keys on a piano, the brain normally deciphers the cues, as they apply to each sound.This is where HiResolution derives its name, because HiResolution processes sound with significantly greater accuracy. HiResolution then details the sound information with 10-20 times greater resolution. HiResolution sound technology DETAILS acoustic sound with 10-20 TIMES greater RESOLUTION so it can be recreated with much greater accuracy. A sophisticated automatic gain control (AGC) continuously optimizes for the environment.We can optimize for each user, with noise adjustments for different environments, and for different user needs, to maximize each users hearing potential. Therefore, users hearing potential cannot be optimized. This is not possible with Nucleus small sound window. This allows the clinician to optimally fit a patient with the most accurate hearing they can have based on their specific hearing potential. The IDR can be programmed to optimize for a user's sensitivity, and to provide programs for various environments. ![]()
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