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[Bug 1373404] Re: No warning of high volume level


As spaniard and thus still someone in the EU here is the behaviour of
the phones i have around me with headset attached:

Shows a notification at 70/80% that doesn't let you increase the volume unless you say "ok, sure"
 * Blackberry Z10
 * Nexus 4 with Android 4.4
 * Unknown manufacturer with Android 4.2

Shows a notification at 70/80% that says "your volume is high, don't listen to it during a long time"
 * Some old Samsung with Android 2.x

Shows nothing:
 * Some old Samsung with Android 2.x
 * HUAWEI U8815N with Android 4.0.x
 * HTC One S with Android 4.0.x

Some of those that show nothing may have been rooted with non european
version of firmware or are "too old"

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  No warning of high volume level

Status in Ubuntu UX bugs:
  Fix Committed
Status in “pulseaudio” package in Ubuntu:
Status in “ubuntu-system-settings” package in Ubuntu:
Status in “unity8” package in Ubuntu:

Bug description:
  The EU has a legal requirement for personal music players to prevent hearing damage.

  For the purpose of this Decision, a ‘personal music player’ means a
  portable device, that is not covered by Directive 1999/5/EC or
  Directive 2006/95/EC, with headphones or earphones, used to listen to
  recorded, generated or broadcasted sound.

  1. For the purpose of Article 4(1)(a) of Directive 2001/95/EC, the
  safety requirement for personal music players shall be the following:
  Personal music players shall be designed and manufactured in a manner
  that ensures that, under reasonably foreseeable conditions of use,
  they are inherently safe and do not cause hearing damage.

  2. The requirement set out in paragraph 1 shall include in particular
  the following:

  (1) Exposure to sound levels shall be time limited to avoid hearing
  damage. At 80 dB(A) exposure time shall be limited to 40 hours/week,
  whereas at 89 dB(A) exposure time shall be limited to 5 hours/week.
  For other exposure levels a linear intra- and extrapolation applies.
  Account shall be taken of the dynamic range of sound and the
  reasonably foreseeable use of the products.

  (2) Personal music players shall provide adequate warnings on the risks involved in using the device and to the ways of avoiding them and information to users in cases where exposure poses a risk of hearing damage.

  Related documents:


  <https://wiki.ubuntu.com/Sound#limits>: "Whenever you are using
  headphones, Ubuntu should frequently measure the volume of sound
  output. Whenever it is over 47 dB(A), your quota should be reduced

  [Originally reported in private bug 1370591.]

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