Thread Subject: Volume Gain Measurement

From: Diane Golden
Date: Tue, May 01 2007 10:00 AM

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I'm not quite sure where we are on the volume gain issue, ?1194.23 (f) and
(g) in Section 508 but thought I'd share information I've gathered from the
major manufacturers of amplified (adaptive) telephones. We volume buy from
all of these companies and it appears that the lack of a standardized
protocol for measuring "dB gain" is a big problem. Depending on the input
signal used (type of sound such as broad band noise, warble tones, something
else) along with the input dB level -- the difference between input and
output or "gain" can vary greatly. Since many states buy large numbers of
amplified phones in bulk for their adaptive telephone programs, they tend to
go for the highest dB gain level phone. Right or wrong, the logic they use
is that a "50 dB gain" phone will meet anyone's needs. (If someone needs
less gain they just use less volume in the 50 dB gain phone rather than
using a 30 dB gain phone.) This has unfortunately encouraged the
manufacturers to use creative approaches in calculating "volume gain" to get
the highest number possible.

Just thought I'd share . . .

Diane

Diane Cordry Golden, Ph.D., Director
Missouri Assistive Technology
816/350-5280 (direct voice)
= EMAIL ADDRESS REMOVED =
www.at.mo.gov

-----Original Message-----
From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ]On Behalf Of Brooner
Mary-AMB004
Sent: Tuesday, May 01, 2007 9:00 AM
To: = EMAIL ADDRESS REMOVED =
Subject: [teitac-telecom] May 7 WG Conf Call - Time Change


Everyone -

Our next meeting of the Telecom Working Group will be Monday May 7. I have
afternoon travel, so I need to change the time to 10:30 a.m. to 12 pm.

The topic for this meeting will be the 1194,23(c) - Voice mail and IVRs.

The call in number remains unchanged: 877.825.8522 pin 0835477

I'm asking Tom Britt to help by re-scheduling the captioning to this time.
Thank you, in advance, Tom.

Brenda is on personal travel but it is my hope she will be able to make this
meeting time based on what she thought her schedule would be. thanks
everyone.

Mary Brooner
Co-Chair

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