Volume 29 Issue 7
HOH-LD-News
Vol. 29, Issue 7
November 18, 2006
Copyright (C) 2006 Hearing Loss Web. All rights reserved.
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Table of Contents
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- Article 1: Breaking Through: Cochlear Implant Advances - Part One
- Article 2: "Reverse Audism" at Gallaudet?
- Article 3: Noisy toys are not for delicate ears
- Article 4: Short Takes
Our advertisers make it possible for us to provide HOH-LD-News as a
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- Advertisers in this Issue
First Premium Placement:
Sonic Alert Alarm Clocks on Sale at Sound Clarity, Inc.
Second Premium Placement:
Wow! Another Big Sale and a $500 Door Prize at Harris Communications
Fourth Premium Placement:
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Classified Section:
Two Online Stores and Two Employment Opportunities
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Contact information and disclaimers are at the end of this newsletter.
~~~~~~~~~~~~~~~~~~~
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- Article 1: Breaking Through: Cochlear Implant Advances - Part One
~~~~~~~~~~~~~~~~~~~
This is a report on Tina Childress' presentation at ALDAcon 2006. For
more coverage of this great convention, please point your browser to
http://www.hearinglossweb.com/res/hlorg/alda/cn/2006/2006.htm
This is part one of two parts.
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I lost my hearing at age 28 in eight months. Yet I've never attended an
ALDAcon before.
Bilateral implantation
Localization Cues - now that I have bilateral CIs, I can localize well
enough to know where my daughter is calling from. Our brain uses the
signal from both sides to get information. A good analogy is the use of an
eyepatch, like when you get your eyes checked. When you use only one eye,
you don't have very good depth perception, so you're not allowed to drive.
Head Shadow Effect - The head blocks sound, so if you only hear out of
one ear, it's hard to hear sound coming from the other side. But in a
noisy environment, that can work to your advantage. The head can block the
noise you don't want to hear, so you can hear better what you do want to
hear.
Binaural Squelch - This refers to the ability to focus on and listen to
one speaker in room full of noise. Being able to do this requires two
ears.
I had a Hearing In Noise Test (HINT) three months after I got my second
implant. This is a test of ability to hear sentences, and in my test, the
sentences were 10 dB louder than the noise. I scored 74% in the ear that
was implanted first, 52% in the second, and 92% using both.
Binaural summation - This refers to the fact that sound perceived from
two ears is perceived as louder than sound perceived from a single ear.
Candidacy considerations
The decision to get a CI has always been an important one. Now people
also have to decide if they should get two CIs at the same time.
Q. Does insurance cover a second implant?
A. Some do. Talk to your CI center, because they are familiar with which
companies cover a second implant.
Q. I have never had bilateral hearing. Would bilateral CIs work for me?
A. That's a question for the CI center. They would have to evaluate you.
Bilateral CIs are a big advantage when a person is trying to hear in
noise. The average binaural advantage is 5 dB, which usually equates to
about 30% gain in HINT scores.
Localization is important for safety, hearing in groups and finding
distant sounds. I lost my car in a mall parking lot after I had bilateral
implants. I activated the horn and I was able to find my car. I never
could have done that with a single implant.
Unlike other hearing aid and CI microphones, our T-Mic sits right in
the ear. So it takes advantage of spectral intensity cues provided by the
outer ear. The outer ear also helps shield against other unwanted sounds,
and it allows people to use standards headphones.
Other considerations for bilateral implantation
If you have an implant now and get a second one, your first one will
probably be your dominant one for a long time. And the longer the time
between the two implantations, the longer the first will be dominant. If
you get them closer together in time, the dominance isn't as great and
won't last as long.
For those who do pretty well with the first one, the second one may not
progress as fast as the first. The differences you see may be quality
issues - things will just sound better.
A voice barely heard at 10 feet with one ear can be heard at 40 feet
with two ears.
Listening with bilateral implants is less tiring and stressful.
Things sound more like what we remember as hearing people.
It's instructive to compare the situation with bilateral CIs now with
the situation with hearing aids in the 1970s. That's when it became common
for people to use two hearing aids. Now we're going through a similar
thing with CIs.
If you have questions or want to talk to a bilateral user, come by our
booth and we'll put you in touch with one.
Speech Processing Strategies
Sound can be characterized by three domains, and it's important to
consider all of them in a processing strategy.
Intensity Domain - We give your brain as much information as possible and
let your brain do the work. Our input dynamic range is 96 dB.
Temporal Domain - We use up to 5200 hz sampling rate and 83K pps.
Spectral Domain - The HiRes120 has 120 channels.
120 spectral bands via current steering
Because we can stimulate multiple electrodes simultaneously, we are
able to effectively create virtual channels, which allows to provide more
frequency information. This is especially important for music and
listening in noise.
This 120 channel capability is available to people implanted since the
spring of 2001, because the internal device supports the required
technology.
It may help some people to understand the various domains by
considering a digital camera analogy. The Temporal rate can be compared to
the camera resolution (pixels). The spectral resolution can be compared to
the number of colors. And the Intensity or Amplitude can be compared to
the camera's dynamic range.
Harmony BTE (new processor)
Our new processor is the Harmony BTE. We have maintained accessory
compatibility with the Auria, so all of your Auria accessories will work
with the Harmony. It features:
- Smallest, least conspicuous headpiece
- Durable processor engineered to withstand rain, sweat, and moisture
- Only processor that supports 120 channels
- Built in Telecoil
- Improved battery life - 50% better - up to 18 hours on a battery
- Built in multi-function LED status indicator, which provides a lot of
information, including an indication of how much battery life remains
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Remember that any order of $50 or more will enter you automatically in
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~~~~~~~~~~~~~~~~~~~
- Article 2: "Reverse Audism" at Gallaudet?
by Debbie Mohney
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Here's Colorado's Debbie Mohney with an interesting interpretation of
what the Gallaudet brouhaha was all about and the larger issues
surrounding it.
~~~~~~~~~~~~~~~~~
You bring up a very good point about perspective. The perspective that
you are referring to in Deaf culture about how the world perceives their
disability is one that is continually perpetuated by the Deaf community.
As a hard of hearing person, I very much feel the reverse audistic
views coming from the Deaf community that I don't belong in their
community because I don't know sign language, and I didn't grow up deaf.
Either society is oppressing them, or the system at Gallaudet is
oppressing the hearing loss community. So, where is this perspective going
to end?
It can only end when people become more open minded about the fact that
there is more than one approach to deafness, and it does mean advancing
into today's world with today's technology. The students have embraced the
technology of instant messaging, so why can't they embrace the technology
that the majority of people with hearing loss want to use? These are
tools, not a method of extinguishing deaf culture, nor eradicating hearing
loss. There will always be people for whom the technology does not resolve
the issues that they have with their hearing loss, and to address them,
the Deaf community needs to realize that we are not against them, we just
want to have the same courtesy of getting the accommodations that we need.
And that must happen at Gallaudet just like any other public institution.
These students need to realize that they are actively discriminating
against a larger hearing loss population that does not use ASL and will
never use ASL.
It doesn't have to be an "us vs them" situation. Our country
has supported Gallaudet by providing tax dollars, and these students have
enjoyed a policy of exclusion for too long in a system that supports
reverse audism, and we as taxpayers should make our voices heard to these
students that inclusion goes both ways. Either they need to learn to be
more open minded and realize that they are not being oppressed and that it
is a learned and perpetuated perspective, or they can become a private
university and pay for this exclusiveness.
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- Article 3: Noisy toys are not for delicate ears
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Editor: Every year about this time we see articles about the dangers of
loud toys. I'm hoping that folks are getting the message and avoiding toys
that can damage a child's hearing. The folks at Hear-it provide some good
tips on avoiding these dangers.
Hear-it is an international site for hard of hearing folks. Please do
take a minute to visit them at http://www.hear-it.org
~~~~~~~~~~~~~~~~~
Children's toys are often extremely noisy. In some cases, they
constitute a direct danger to children's hearing.
When used in ordinary play, some types of battery-driven toy guns can
create noise levels between 110 and 135 dB, corresponding to the noise
generated by a heavy truck, a rock concert or an airliner at take-off.
Less, but consistent, noise from music boxes or robots (85-95 dB) can also
be damaging.
In many workplaces, employees are required to wear hearing protection
where noise levels exceed 85 dB. Noisy toys are not only a problem to
children but also to parents as they often find the noise annoying and
even painful, too.
Noice-induced hearing loss is cumulative; it happens gradually over
time. That is why it is important to start protecting your child's hearing
at an early age. Because of a child's shorter arm span, noisy toys are
potentially more dangerous as children hold them close to the ear.
Moreover, the way children play with their toys usually does not comply
with the industry's "recommended use".
It is, therefore a good idea, when buying toys, to find out how much
noise they generate, and perhaps choose other types of less noisy toys.
Parents can also check their children's toys to find out how to reduce
their noisiness, which toys should be removed and which are only suitable
for outdoor use.
Below, hear-it has collected some practical advice for parents,
including information on potential risks and possible measures that can be
taken to reduce the noise generated by toys.
- Think about noise when buying toys. If it sounds too loud to you, it
will also be too loud for your child.
- Avoid buying toys that have a warning that they should not be used
close to the ears, as children will forget this during play.
- Put masking tape over the speaker of the toy to reduce the volume.
- Musical instruments and toy guns with sound effects can be damaging
or cause irritation. In some cases, the best solution is to replace such
toys with other less noisy toys or restrict their use to outside play
areas.
- Computer games can be annoying for other people. Place your
children's computer in a special room rather than in the living room or
common room.
- Children's mats or rugs are an efficient means of reducing noise from
playing blocks, for example.
How you store the toys also affects noise levels. Hardwood or plastic
boxes create lots of noise when the children rummage around for their
toys, or empty the contents onto the floor. Line the boxes with fabric or
felt to reduce noise. Toys can also be kept in baskets or fabric bags.
Apart from the safety and nuisance aspects of noisy toys, parents
should also consider that noisy toys convey the message to children that
hearing health is not important.
The damaging effect of repeated exposure to intense noise over a
person's life span is something we should warn our children about.
Educating kids on the importance of hearing conservation as a preventive
measure and teaching them healthy hearing habits is just as important as
focusing on the immediate noisy source.
Sources: "Noisy Toys: Annoying or Harmful?", The Hearing
Review, 2006, "Støj i daginstitutioner - om praktiske/tekniske
løsninger til dæmpning af støjen i daginstitutioner og
skolefritidsordninger.", Socialministeriet, 2001 (Noise in day-care
centres - practical/technical solutions for reducing noise in day-care
centres. Danish Ministry of Social Affairs, 2001.) and "Høje lyde
fra legetøjshylden", Råd & Resultater nr. 3, 1999 ("Noise
from the toy shelf", the Danish consumer magazine Råd &
Resultater, 3, 1999).
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- Article 4: Short Takes
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Editor: Here are our picks of some additional stories that you may find
interesting. For more, please point your browser to: http://www.hearinglossweb.com/news/curr.htm
~~~~~~~~~~~~~~~~~~~
Aberdeen Captioning Comments on FCC Exemptions
The hearing loss community is pretty upset about the permanent
captioning exemptions recently granted by the FCC, and consumers with
hearing loss have stepped up and provided lots of comments. Here's a
somewhat different perspective from the folks who run Aberdeen Captioning,
who do a lot of captioning of religious programming. Their fees (as little
as $60 for a live half-hour show) really call into question the
"financial hardship" claim upon which the exemptions are based.
http://preview.tinyurl.com/y2466l
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Bilateral Cochlear Implants go Mainstream
Many cochlear implant recipients are happy with hearing from just one
ear, but even good-hearing cochlear implant recipients commonly have
difficulty hearing in noise. Even in mildly noisy situations, a single
cochlear implant does not seem loud or clear enough, in part because two
ears are needed to provide direction of sound, focus on a speaker, and
suppress extraneous sounds. A growing body of research now shows that many
of these deaf individuals benefit from bilateral (two ear) hearing
restoration with cochlear implants. Fascinating is that the same
physiological tools normal hearing folks use to hear better in noise with
two ears (binaural hearing) also help bilateral cochlear implant
individuals.
http://preview.tinyurl.com/y6ou92
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Bluetooth 101: The Audiologist's Guide
Bluetooth technology has been implemented in numerous consumer
electronic devices (Miller 2002) and has now struck the field of
Audiology. A handful of Bluetooth products are now available to patients
to enhance the listening performance of current hearing systems. Bluetooth
devices available on the market enable wireless transmission of sound
between a mobile phone and an ear-level unit, a mobile phone and a
microphone transmitter, and a microphone transmitter to an ear-level unit.
This ear-level unit may be attached to an existing hearing aid or an
independent device fitted directly in the ear canal.
http://www.audiologyonline.com/articles/article_detail.asp?article_id=1715
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- Classifieds
~~~~~~~~~~~~~~~~~~~
Two online stores and two employment opportunity appear in this issue.
(Ads appear after this brief table of contents.)
WCI. Providing Solutions for People with Hearing Loss.
ALL CLARITY PHONES 20% OFF
http://www.weitbrecht.com
Potomac Technology. Everything You Need Under One Roof!
EASY HOLIDAY SHOPPING!
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Employment Opportunity 1
Various Positions
GLAD
Los Angeles
Employment Opportunity 2
Superintendent
Illinois School for the Deaf
Jacksonville, IL
-------------------
WCI. Providing Solutions for People with Hearing Loss.
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Employment Opportunity 1
Various Positions
GLAD
Los Angeles
-------------------
GLAD is an Affirmative Action Employer with equal opportunity for men,
women and people with disabilities. For more information on the following
positions, please go to: www.gladinc.org. The status of all positions is:
Regular, Full-time, Non-Exempt, Full Fringe Benefits unless otherwise
noted. All positions are open until filled.
* Director of Human Services - Los Angeles, CA
* Community Interpreter - Riverside, CA
* Job Developer/Interpreter - Crenshaw, Norwalk and West Covina, CA
* Community Health Educator-Los Angeles, CA
* LIFESIGNS Dispatcher - Riverside, CA
* Grant Writer - Los Angeles, CA
* Accounts Receivable Specialist - Los Angeles, CA
* Program Assistant/Interpreter - Los Angeles, CA
If interested for any of these positions then please submit resume and
application to:
Jeff Fetterman
Human Resources Specialist
Greater Los Angeles Agency on Deafness, Inc.
2222 Laverna Avenue
Los Angeles, CA 90041
V/TDD: (323) 550-4207
Fax #: (323)550-4204
E-mail: jfetterman@gladinc.org
-------------------
Employment Opportunity 2
Superintendent
Illinois School for the Deaf
Jacksonville, IL
-------------------
The Illinois School for the Deaf, announces a vacancy for the
SUPERINTENDENT position. Applications are due by January 15, 2007, with a
start date of July 1, 2007.
Founded in 1839 and located on a beautiful 50 acre campus in
Jacksonville, Illinois School for the Deaf is a residential state school
for the education of children who are deaf and hard of hearing in
Illinois. The school is operated by the State Department of Human
Services/Division of Rehabilitation Services with the objective of
preparing students for productive, well-adjusted and responsible adult
lives.
Marjorie Olson
400 West Lawrence
Springfield IL 62794-9429
217-524-1379 (Voice/TTY)
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~~~~~~~~~~~~~~~~~~~
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