Designed for a "broadcast professional" the Koss Pro4AAA headphones have a titanium coating on "2 mil mylar diaphrams for a frequency response of 10-25,000 Hz." This means they sound good.
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These are closed ear headphones, which means they block sound from the outside. They're not completely sound blocking, like The Plug, but they should be enough to tune out the cries of your infant child so you can finally get some work done.
Available for $149 with a lifetime warranty.
Koss Introduces the PRO4AAA Titanium [Koss]