Types
The type of headphones you buy depends mostly on your lifestyle and somewhat on your budget. Some people buy different types
of headphones for different uses, such as a pair to wear while exercising and another for listening to high-fidelity music.
Here are the types of headphones to consider.
Home/studio headphones
These headphones are usually larger models that look like earmuffs, with earpieces connected by a headband. Most are corded,
with wires that run from 3 feet to 8 feet long so they can be connected to an audio source such as a receiver or TV. Some
can be folded for storage and come with carrying pouches. There are also battery-powered wireless models that pick up radio
frequency or infrared transmissions from a base unit that connects to an audio source. Home/studio headphones come in a few
basic designs:
Over-the-ears (circumaural)
These models cup your ears, sealing in sound and muffling ambient noise. But they might also block out some things that you
want to hear, such as a doorbell or a child's cry.
Over-the-ears, open
These headphones have openings in the ear cups. You'll be able to hear more external sounds but sounds can also escape, perhaps
enough to keep someone nearby awake.
On-ear (supra-aural)
Headphone models of this type are generally lighter and don’t press on the sides of your head—they press upon the ears. Many
wearers find them more comfortable for long listening sessions, but they can allow more ambient sound to enter. On-ear headphones,
like over-the-ear, also come in open and closed versions. Most of these models use an adjustable strap that fits over, or
behind, your head to hold them in place. (The behind-the-head models are sometimes called “street style.”) Some can be folded
for storage and come with carrying pouches.
Portable headphones
Available in a variety of styles, all are lightweight, small, and may be foldable so they can be tucked away in a pocket or
purse when not in use. They come in a variety of styles:
Hanging, over-ear
This type of headphone generally has ear cups that attach to your ears with clips, so they don't put pressure on the ears.
Ear buds (intra-concha)
These are the familiar type that typically comes with iPods and other portable audio players.
Insert-style (intra-canal)
These earphones are inserted into the ear canal, forming a seal that can help keep out extraneous sounds. Many come with additional
earpieces (canal tips) of varying sizes to ensure a proper, comfortable fit.
Sports-style on-ear models
Sports-style on-ear (supra-concha)
These models are a good choice when you'll be engaged in a strenuous activity or exercise. The phones are supported by a bracket
that passes around the back of the head, and generally radiate sound forward toward the ear canal rather than sideways directly
into the ear canal.
Wireless headphones
Wireless models, once rare, are now increasingly common, and typically use RF, infrared, or Bluetooth wireless technologies.
Most have a battery-powered headset and an AC-powered transmitter that connects to your audio or video gear. RF models can
transmit signals through walls and floors, enabling you to use the headphones in other rooms or even outside. But they are
also subject to interference from other devices that operate on the same frequencies, such as cordless phones and microwave
ovens. Several RF technologies are used, including: FM (analog) or digital spread spectrum.
Wireless headphones that use infrared technology, much like a TV remote, require a direct line of sight to the transmitter.
Bluetooth is a type of digital spread-spectrum technology, and the typical model has an operating range of about 30 feet.
Bluetooth technology used in headphones (and other hi-fi audio uses) should employ the A2DP (Advanced Audio Distribution Profile)
or "advanced audio" feature, rather than the narrow-band voice-quality mode used for wireless cell phone headsets.
Active noise-reduction headphones
Active noise-reduction headphones
Noise-reducing headphones are a good choice for anyone who doesn't want to be disturbed by outside noise. Any headphones with
a closed design that fit tightly over your ears or inside the ear canal will block some noise by creating a seal. This is
called passive noise reduction. Closed design over-the-ear and insert-style earphones tend to block more noise than do open
design, on-ear, and ear-bud-style headphones. Models with active noise-canceling technology go a step further. These battery-powered
headphones use tiny microphones to monitor noise frequencies, and then produce those same frequencies out of phase in an effort
to cancel them. We've found that the effectiveness of noise reduction technology can range from very good to poor. In general,
we found the most effective noise-reduction in models that combined passive noise blocking with active noise cancellation.
Some models let you turn off noise reduction; these will work without batteries. Others work only with noise canceling activated,
and thus they can't be used for listening to music if the batteries die. And in some cases, you can use the noise-canceling
feature even when you're not listening to music, simply to reduce outside noise.