Cochlear SPrint Sound Processor Informações Técnicas descarregar pdf (Página 56)

SECTION ONE | CLINICAL GUIDANCE

Many factors impact the battery life of a sound processor including the use

of some accessories. It is important to note that ear-level FM receivers that

require the use of the Euro Accessory Adaptor are active devices (i.e. they

draw power from the CP810 Sound Processor, unlike other accessories such

as the personal audio cable which is not an active device). Therefore use of

an ear-level FM receiver with the Euro Accessory Adaptor will reduce battery

life of the CP810 Sound Processors. This reduction can range from 10-40% of

battery life, depending upon various MAP parameters and whether a dynamic

FM system is used. (The most recent Build Standard of the CP810 Processor

(Build Standard C) is required in order to use a dynamic FM ear-level receiver.)

Recipients with high powered MAPs (the battery life estimate is <19 hours with

the standard battery module using two Zinc Air batteries) may experience

issues with FM use. In this scenario, the FM device exceeds the power

capability of the two Zinc Air batteries and the clinician may need to lower the

MAP stimulation rate or recommend use of the standard rechargeable battery

module. Custom Sound will provide information about whether a battery

module is suitable with using FM systems. This information can be accessed

when viewing the battery life estimates for the different battery types.

Towards the end of processor battery life, plugging in a coupled ear-level FM

receiver and Euro Accessory Adaptor may cause the sound processor to shut

down with the standard battery module (using two Zinc Air batteries). The

solution is to insert fresh batteries when using an ear-level FM receiver.

For additional FM information including troubleshooting tips and a list of

compatible FM receivers, please refer to the document ‘FM Solutions for the

CP810 Sound Processor’.

1.15.2 Freedom Sound Processors

The accessory mixing ratio determines the amount of attenuation of the

Freedom microphone compared to the FM transmitter microphone. The

mixing ratio is set for each program using Custom Sound. For children, the

default mixing ratio for accessories is 1:1. In a classroom environment this

provides a good compromize between FM inputs (teacher) and the sound

processor microphone inputs (other students in the room). For adults, the

default mixing ratio for accessories is 2:1 to provide automatic FM precedence

by reducing the audibility of sounds coming directly into the Freedom Sound

Processor microphone.

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