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Supra-aural Head Phone Best Wireless Headphones Bluetooth/Headphones (or head-phones in the early days of telephony and radio) traditionally refer to a pair of small loudspeaker drivers worn on or around the head over a user’s ears. They are electroacoustic transducers, which convert an electrical signal to a corresponding sound. Headphones let a single user listen to an audio source privately, in contrast to a loudspeaker, which emits sound into the open air for anyone nearby to hear. Headphones are also known as earspeakers,
Supra-aural Head Phone
A pair of supra-aural (on-ear) headphones
Supra-aural headphones – or on-ear headphones have pads that press against the ears, rather than around them. They were commonly bundled with personal stereos during the 1980s. This type of headphone generally tends to be smaller and lighter than circumaural headphones, resulting in less attenuation of outside noise. Supra-aural headphones can also lead to discomfort due to the pressure on the ear as compared to circumaural headphones that sit around the ear. Comfort may vary due to the earcup material.
Open or closed back
Both circumaural and supra-aural headphones can be further differentiated by the type of earcups:
Open-back headphones have the back of the earcups open. This leaks more sound out of the headphone and also lets more ambient sounds into the headphone, but gives a more natural or speaker-like sound, due to including sounds from the environment.
Closed-back (or sealed) styles have the back of the earcups closed. They usually block some of the ambient noise. Closed-back headphones usually can produce stronger low frequencies than open-back headphones.
Semi-open headphones have a design that can be considered as a compromise between open-back headphones and closed-back headphones. Some believe the term “semi-open” is purely there for marketing purposes. There is no exact definition for the term semi-open headphone.
Ear-fitting headphones
Earphones
Earphones are very small headphones that are fitted directly in the outer ear, facing but not inserted in the ear canal. Earphones are portable and convenient, but many people consider them uncomfortable. They provide hardly any acoustic isolation and leave room for ambient noise to seep in; users may turn up the volume dangerously high to compensate, at the risk of causing hearing loss.
In-ear headphones
In-ear monitors extend into the ear canal, providing isolation from outside noise.
In-ear headphones – also known as in-ear monitors (IEMs) or canal phones, are small headphones with similar portability to earbuds that are inserted in the ear canal itself. IEMs are higher-quality in-ear headphones and are used by audio engineers and musicians as well as audiophiles.
The outer shells of in-ear headphones – are made up of a variety of materials, such as plastic, aluminum, ceramic and other metal alloys. Because in-ear headphones engage the ear canal, they can be prone to sliding out, and they block out much environmental noise. Lack of sound from the environment can be a problem when sound is a necessary cue for safety or other reasons, as when walking, driving, or riding near or in vehicular traffic.
Mixed fitting pivoting earphones
NeckTec IEMs with rotating Z-shaped shaft for constant wear in 1of2 positions: “comfort” for quiet indoors and “quality” for noise insulation & powerful sound.
This type combines advantages of earbuds and in-ear headphones depending on the environment and requirements of the user, they provide passive noise reduction for quality mode (conversation or active music listening) or they give control over the sound environment around the user in comfort mode (stand by or background voice/music listening).
Headset EarPhone
A typical example of a headset used for voice chats
A headset is a headphone combined with a microphone. Headsets provide the equivalent functionality of a telephone handset with hands-free operation. Among applications for headsets, besides telephone use, are aviation, theatre or television studio intercom systems, and console or PC gaming.
Telephone headsets
Sony Ericsson Cordless BlueTooth headset – Telephone headsets connect to a fixed-line telephone system. A telephone headset functions by replacing the handset of a telephone. Headsets for standard corded telephones are fitted with a standard 4P4C commonly called an RJ-9 connector. Headsets are also available with 2.5 mm jack sockets for many DECT phones and other applications. Cordless Bluetooth headsets are available and often used with mobile telephones. Headsets are widely used for telephone-intensive jobs, in particular by call center workers. They are also used by anyone wishing to hold telephone conversations with both hands-frees.
Communication headsets
Communication headset used by aviators
Communication headsets are used for two-way communication and typically consist of a headphone and an attached microphone. Such headsets are used in a variety of professions as aviation, military, sports, music, and many service-oriented sectors. They come in all shapes and sizes, depending on use, required noise attenuation, and fidelity of communication needed.
Ambient noise reduction
In-ears are among those good for noise isolation. Unwanted sound from the environment can be reduced by excluding sound from the ear by passive noise isolation, or, often in conjunction with isolation, by active noise cancellation.
Passive noise isolation – is essentially using the body of the earphone, either over or in the ear, as a passive earplug that simply blocks out sound. The headphone types that provide most attenuation are in-ear canal headphones and closed-back headphones, both circumaural and supra-aural. Open-back and earbud headphones provide some passive noise isolation, but much less than the others. Typical closed-back headphones block 8 to 12 dB, and in-ears anywhere from 10 to 15 dB. Such headphones claim to reduce ambient noise by around 25 dB.
Active noise-canceling headphones – use a microphone, amplifier, and speaker to pick up, amplify, and play ambient noise in phase-reversed form; this to some extent cancels out unwanted noise from the environment without affecting the desired sound source, which is not picked up and reversed by the microphone. They require a power source, usually a battery, to drive their circuitry.
