Other hardware: Difference between revisions
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* Impedance - Doesn't mean much by itself, but in general, impedence should be matched across a system. | * Impedance - Doesn't mean much by itself, but in general, impedence should be matched across a system. | ||
* SPL@1kHz, 1V rms - How | * SPL@1kHz, 1V rms - [http://en.wikipedia.org/wiki/Sound_pressure_level#SPL_in_audio_equipment Sound Pressure Level]. How efficient the unit converts electrical energy to sound energy. | ||
* Neodymium - The magnet of choice for high end headphones. | * Neodymium - The magnet of choice for high end headphones. | ||
Revision as of 17:27, 4 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
Terminology used for comparing headphones
- 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.