Thread Subject: Re: 1194.25 (f) Voice Output in Public Area

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From: Diane Golden
Date: Wed, Jun 06 2007 4:55 PM

Couple of problems with this output requirement --
The dB level does not specify a scale like sound pressure level (SPL).
Assuming it means dB SPL then 65 dB SLP is really not sufficiently for
delivery via speaker in a public area with any degree of ambient noise. If
the audio is being delivered via headset, handset, or some other coupling to
a persons ear or hearing aid - the 65 dB SPL level makes more sense.

Diane Golden
NASCIO

-----Original Message-----
From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ]On Behalf Of Sean Hayes
Sent: Wednesday, June 06, 2007 5:35 PM
To: TEITAC self contained/closed products subcommittee
Subject: Re: [teitac-closed] 1194.25 (f) Voice Output in Public Area


Can you clarify whether this is intended for products permanently installed
in a public area, or whether it is intended to apply to closed products like
a personal music device or phone being operated in public area.

Thanks,

Sean Hayes
Standards and Policy Team
Corporate Accessibility Group
Microsoft
Phone:
mob +44 7977 455002
office +44 117 9719730


-----Original Message-----
From: = EMAIL ADDRESS REMOVED =
[mailto: = EMAIL ADDRESS REMOVED = ] On Behalf Of Debbie Cook
Sent: 06 June 2007 22:28
To: = EMAIL ADDRESS REMOVED =
Subject: [teitac-closed] 1194.25 (f) Voice Output in Public Area

Current Language:
When products deliver voice output in a public area, incremental volume
control shall be provided with output amplification up to a level of at
least 65 dB. Where the ambient noise level of the environment is above 45
dB, a volume gain of at least 20 dB above the ambient level shall be user
selectable.
A function shall be provided to automatically reset the volume to the
default level after every use.

Discussion:
The only issue raised is that it is generally difficult to determine ambient
noise level in a public place especially where that noise level may change.
Can we just prescribe the 65DB and that it is otherwise user selectable
without trying to deal with variations in ambient noise?

Debbie Cook
WA Assistive Technology Program
Box 357920
Seattle, WA 98195-7920
Phone: 206-685-4181

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