Cochlear SPrint Sound Processor Informações Técnicas descarregar pdf (Página 40)

SECTION ONE | CLINICAL GUIDANCE

Whisper may not provide signiﬁcant beneﬁt to all recipients in all environments.

Past studies

2,3

with Whisper have found signiﬁcant advantages when

listening to soft input levels. While Whisper has been proven to improve

performance when listening to low-level signals, it is not recommended in

noisy environments. For the studies above, with sentences in multi-talker

babble, scores were signiﬁcantly lower when using Whisper. This result was

due to Whisper amplifying lower input signals, including noise. In more recent

studies with the Nucleus

Freedom

™

, 39 CI recipients participated in testing to

compare ADRO, Whisper and a MAP with no input processing

(see Figure 12).

The SmartSound technologies of ADRO

and Whisper were compared to a

MAP with no input processing. Error bars represent one standard error from the

mean. Statistical signiﬁcance is indicated by asterisk symbols. For CNC words

presented at a low level of 50 dB SPL, a statistically signiﬁcant improvement

in performance was found for both ADRO and Whisper compared to the

standard program. There was no signiﬁcant difference found between ADRO

and Whisper for this condition. As for previous studies, there was no signiﬁcant

difference between performance with ADRO, Whisper, and the standard MAP

for listening to words at the higher level of 60 dB SPL.

Figure 11 : Input/

output functions

of the standard

microphone setting

(dashed line) and

when Whisper is

enabled (solid line)

referenced to a 1

kHz sine wave.

20 30 40 50

Input Signal (dB SPL)

Processed Signal (dB SPL)

60 70 80 90

1:1

2:1

AGC

operating

Whisper boosts soft

sounds but not

loud sounds

1 2 ... 35 36 37 38 39 40 41 42 43 44 45 ... 77 78

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