active sport earphones make it easy to work up a sweat and get your body moving with ear supports that wrap over the top of your ear to ensure that the bud will never fall out, even during an intense workout or sports practice. pick up a sleek travel case for your earbuds to that you can take your music on the road with you without having to worry about whether or not your earbuds will get tangled up or break and be sure to have a phone charger ready so you won’t ever have to miss out on listening to your favorite music.
Both of Jaybird's current running headphones, the Tarah and the X4, are excellent, durable, long-lived workout buds with fantastic sound quality. But if you don't need the X4's special, squishy Comply foam ear tips, and you're OK with losing the storage pouch, the Tarah has everything you need at a sweet price point. The eargels with wings fit securely out of the box and stayed put while trail running, rock climbing, and weight lifting; They weigh less than half an ounce. You can also tinker with the EQ in the Jaybird mobile app, either by choosing one of Jaybird's presets or customizing it yourself.
These headphones pack about 16 hours of battery life, which ought to be enough for a whole day or more, but if not, there’s always the option of using an analog cable instead. An external switch lets you turn the noise cancellation on and off. Make no mistake, these might be aimed at kids, but the quality of construction, selection of materials, and color choices give them an appearance that will still appeal to your young charges long after they’ve outgrown their Disney phase (some of us still haven’t).
The design is not mechanically stable; a slight imbalance makes the armature stick to one pole of the magnet. A fairly stiff restoring force is required to hold the armature in the 'balance' position. Although this reduces its efficiency, this design can still produce more sound from less power than any other[clarification needed]. Popularized in the 1920s as Baldwin Mica Diaphragm radio headphones, balanced armature transducers were refined during World War II for use in military sound powered telephones. Some of these achieved astonishing electro-acoustic conversion efficiencies, in the range of 20% to 40%, for narrow bandwidth voice signals.

The thermoacoustic effect generates sound from the audio frequency Joule heating of the conductor, an effect that is not magnetic and does not vibrate the speaker. In 2013 a carbon nanotube thin-yarn earphone based on the thermoacoustic mechanism was demonstrated by a research group in Tsinghua University.[22] The as-produced CNT thin yarn earphone has a working element called CNT thin yarn thermoacoustic chip. Such a chip is composed of a layer of CNT thin yarn array supported by the silicon wafer, and periodic grooves with certain depth are made on the wafer by micro-fabrication methods to suppress the heat leakage from the CNT yarn to the substrate.[citation needed]
In-ear headphones are like earbuds but are an upgrade to them. These headphones fit into the wearer's ear canal and stay in place with the use of foam or rubber tips. These tips are available in custom sizes so they can fit each individual wearer. When a proper fit's achieved, in-ear headphones reduce outside noise and deliver sound quality at about the same level as over-ear and on-ear headphones.
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