Other hardware: Difference between revisions
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== Headphones == | == Headphones == | ||
Some Styles (smallest to largest) | |||
* In the ear - outputs directly into the ear canal | |||
* Earbuds - sits in the outer ear | |||
* Supra-aural - sits on the ear | |||
* circumaural - completely cover the ear | |||
Terminology used for comparing headphones | Terminology used for comparing headphones | ||
* Noise Cancelling | |||
** active | |||
** passive | |||
* Frequency response - The range of frequencies the headphones can reproduce | * Frequency response - The range of frequencies the headphones can reproduce | ||
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* Neodymium - The magnet of choice for high end headphones. | * Neodymium - The magnet of choice for high end headphones. | ||
Popular Headphones | |||
* Sub $30 | |||
* Sub $100 | |||
* $100 - $300 | |||
* $300+ | |||
Revision as of 05:49, 5 July 2006
This article is a stub. You can help the Hydrogenaudio Knowledgebase by expanding it.
Bluetooth (A2DP)
Advanced Audio Distribution Profile (A2DP)
Supports the codecs: Sub Band Codec (SBC)
Optionally supports: MPEG-1,2 Audio, MPEG-2,4 AAC and ATRAC,
With the bitrate limited by the bluetooth link
Sub Band Codec
- Sampling Frequency - 16000, 32000, 44100, 48000 (some are optional, see references)
- Channel Mode - mono, dual channel, stereo, joint stereo
The bitrate used for CD quality audio is 229 kbps and 328 kbps for middle and high quality, respectively.
Reference: BLUETOOTH Advanced Audio Distribution Profile 1.0
Headphones
Some Styles (smallest to largest)
- In the ear - outputs directly into the ear canal
- Earbuds - sits in the outer ear
- Supra-aural - sits on the ear
- circumaural - completely cover the ear
Terminology used for comparing headphones
- Noise Cancelling
- active
- passive
- Frequency response - The range of frequencies the headphones can reproduce
- Impedance - Doesn't mean much by itself, but in general, impedence should be matched across a system.
- SPL@1kHz, 1V rms - Sound Pressure Level. How efficient the unit converts electrical energy to sound energy.
- Neodymium - The magnet of choice for high end headphones.
Popular Headphones
- Sub $30
- Sub $100
- $100 - $300
- $300+