Headphones are a handy device for silencing traffic, listening to the traffic report, or stopping traffic with a flawlessly executed crosswalk shimmy. Get an aurally pleasing upgrade with today's Groupon: for $20 you get $45 toward any headphones at Capital Audio, located in the heart of Tribeca.

Capital Audio has been hooking up customers' cranial canals with the latest gadgets for more than 30 years. Headphones range in size, sound quality, and price, from tiny, workout-appropriate earbuds to boom box hybrids stapled to each side of the skull. The foldable Panasonic noise-canceling headphones ($39.95) block out 75% of unwanted noise, making them a handy device for listening to the dictionary or ignoring encyclopedic travel companions. Listen in style with the lightweight retro-inspired Panasonic full-size music makers ($39.99), or opt for smaller buds suited for everyday use, such as the in-ear JVC Bi-Metal headphones ($44.95), which come standard with a compact carrying case and three sets of rubber earpieces that are, like the sides of an obtuse triangle, three different sizes.