One of the most popular topics in Brainstorm at present is volume
adjustments for headphone use:
http://brainstorm.ubuntu.com/idea/27275/
As an audio expert, we would appreciate if you could spend a short time
reading the Brainstorm content about it and writing a few paragraphs.
You don't need to have all the answers, and I encourage you to ask for
input from others who might have a view on the issue. This can be in
the form of a detailed upstream bug report, a blog post, an email, or
any other suitable format. It shouldn't take more than an hour or two
to complete.