Cochlear SPrint Sound Processor Información técnica descargar pdf (Pagina 46)

SECTION ONE | CLINICAL GUIDANCE

equally, so a null position is selected to give the best overall result. With zoom,

this null direction is ﬁxed (Figure 17). Zoom provides more moderate noise

cancelling compared to Beam and is recommended for generally noisy places

or for situations where the noise is stationary and the listener can move such

that the noise source is behind him. It is not recommended for use in quiet or

windy environments. Zoom+ASC+ADRO

is now the default Noise program in

the Custom Sound Programming software.

Zoom functionality with the CP810 was evaluated as part of the Nucleus 5

validation

. Speech-in-noise testing was conducted with 15 Australian subjects

using a spatially separated noise setup, in which four talker babble was delivered

from speakers positioned at left, right, and behind the subject (N 90,180, 270,).

The signal-to-noise ratio was optimized for each participant to avoid ﬂoor and

ceiling effects. Three conditions were assessed : Freedom and CP810 using

standard microphone directionality (no zoom), and CP810 with zoom activated.

Group mean results for CUNY sentences at 65 dB SPL are shown in Figure 18. A

statistically signiﬁcant mean improvement of 30 percentage points was shown

with zoom enabled on CP810 (74%) compared to when zoom was switched off

(44%). There was no difference in group mean scores between Freedom and

CP810 when standard directionality (no zoom) was used.

Figure 17: CP810

Zoom directional

sensitivity - on the

head. The blue

line is the CP810/

Freedom directional

microphone

sensitivity (no

zoom), and the

red line is the

CP810 with zoom

activated.

CP810 Zoom

Freedom Dir /

CP810 Standard

(without zoom)

Head blocks sound a

little more on this side

due to the sound

processor being worn

on other ear

Processor

1 2 ... 41 42 43 44 45 46 47 48 49 50 51 ... 77 78

Comentarios a estos manuales

Sin comentarios

Cochlear SPrint Sound Processor Información técnica Pagina 46

Comentarios a estos manuales

Relacionado con productos y manuales para No Cochlear SPrint Sound Processor