Cochlear SPrint Sound Processor Informacje Techniczne Pobierz pdf (Strona 32)

SECTION ONE | CLINICAL GUIDANCE

The selected channels receive sequential stimulation in tonotopic order from

high to low frequency. SPEAK uses a stimulation rate of 250 pulses per second

(pps). The total stimulation rate (TSR) across the array is 2,000 pps for eight

maxima and 2,500 pps for 10 maxima. SPEAK cannot currently be used with

the CP810 Sound Processor unless accessed as a regional option in the Custom

Sound

™

software.

Figure 6 illustrates the spectrogram (i.e. spectral analysis) of the English word

‘choice’ and the corresponding electrodogram. The electrodogram represents

the electrical stimulation pattern for ‘choice’ through SPEAK. Each striation

in the electrodogram indicates stimulation of a channel. This 20-channel

electrodogram clearly shows how SPEAK provides frequency information that

corresponds to the frequency information in the spectrogram (see Figures 6

and 7).

Figure 7 :

Electrodogram of

the English word

‘choice’ using the

SPEAK strategy

Figure 6 :

Spectrogram of

the English word

“choice” using the

SPEAK strategy

1 2 ... 27 28 29 30 31 32 33 34 35 36 37 ... 77 78

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Cochlear SPrint Sound Processor Informacje Techniczne Strona 32