Cochlear ESPrit 3GSound Processor Guida Utente

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56
A
N EDUCATOR’S GUIDE
18. American Speech-Language-Hearing Association. (2005). Acoustics in educational settings:Technical report. Available at http://www.asha.org/members/deskref-jour-
nals/deskref/default
19. American Speech-Language-Hearing Association. (2005). Guidelines for addressing acoustics in educational settings. Available at http://www.asha.org/members/deskref-
journals/deskref/default
Introduction to FM section
All children with hearing loss require a good listening environment
and because most schools are noisy places, a child with hearing
loss should always be evaluated for an assistive listening system. A
personal FM, in which the teacher’s voice is transmitted directly to
the child’s cochlear implant processor
, will provide the highest
signal-to-noise ratio (SNR) and therefore the best sound signal.
Sound field systems—either area-wide or on the student’s desk—
will impro
ve the SNR, but not as much as a personal FM. Signal-
noise-ratio is defined as the difference, in decibels, between the
speaker’s voice and the surrounding background noise. For
example
, if the background noise in a classroom was 55 decibels
(not unusual in the typical school) and the sound source (or
teacher’s voice) at the child’s ear was 60 decibels, the SNR would
be 5. The SNR for a child with a cochlear implant should be at
least 15 decibels.
18,19
As the da
y goes on,
two things often happen:
(1) the teacher becomes fatigued and his/her voice level drops
and (2) the children become restless and classroom sounds are
amplif
ied.
Thus,
without an FM system,
the intensity lev
el of the
sound source tends to go do
wn by a few decibels in the afternoon
while the noise level in the room increases—making the situation
ev
en w
or
se! For additional inf
ormation on acoustics, please refer
to Chapter 5.
Introduction to
FM systems
Troubleshooting the
FM systems
FM compatibility guide
Other assisted listening
devices
CHAPTER 7
Accessories and assistive listening devices
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Sommario

Pagina 1 - CHAPTER 7

56•AN EDUCATOR’S GUIDE18. American Speech-Language-Hearing Association. (2005). Acoustics in educational settings:Technical report. Available at http:

Pagina 2 - FM Technology and Federal Law

AN EDUCATOR’S GUIDE •65Using accessories and ALDswith ESPrit 3G sound processor (for Nucleus 22 and Nucleus 24 cochlear implant systems)The Accessori

Pagina 3 - FM systems

66•AN EDUCATOR’S GUIDEConnecting accessories with a standard3.5mm audio jack to the ESPrit 3GThere are a number of accessory patch cables thathave a s

Pagina 4 - N EDUCATOR’S GUIDE

AN EDUCATOR’S GUIDE •67Connecting Accessories to the ESPrit /ESPrit 22 BTE ProcessorProcessorAdapters Cables CablesESPrit / ESPrit 22Audio coverAcces

Pagina 5

AN EDUCATOR’S GUIDE •57The chart below illustrates the improvements insignal-to-noise ratio aided by use of a FM system,use of a hearing aid on the o

Pagina 6 - Troubleshooting

58•AN EDUCATOR’S GUIDEThere are three primary types of FM systems An area-wide sound field FM system will improvethe SNR in the classroom by using a m

Pagina 7 - Nucleus Accessories

AN EDUCATOR’S GUIDE •59It is important to know when it is appropriate toturn off the transmitter as well. Children wearing anFM should not be able to

Pagina 8 - Lapel microphone

60•AN EDUCATOR’S GUIDEd. Turn on the sound processor to the program location recommended by the cochlear implant audiologist for FM use.e. If necessar

Pagina 9 - SPrint Accessory Connection

AN EDUCATOR’S GUIDE •61TroubleshootingIf the student reports a problem during use of thesound processor and personal FM system, a firststep would be

Pagina 10 - Using accessories and ALDs

62•AN EDUCATOR’S GUIDEback on. Again, remember that the monitor earphones time out – if this happens, press theIncrease and Decrease buttons together

Pagina 11 - Accessory Adapter Cable

AN EDUCATOR’S GUIDE •63magnetic signal a lot better than the acoustic signalfrom the sound processor’s microphone. In otherwords, a telecoil acts as

Pagina 12 - ESPrit 22 BTE Processor

64•AN EDUCATOR’S GUIDEUsing accessories and ALDs withNucleus Freedom sound processorThe accessory port is located on the “shoe” at thebase of the proc

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