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参数资料
| 型号： | CMI-8738 |
| 厂商： | C-Media Electronics Inc. |
| 英文描述： | C3DX PCI-Based HRTF 3D Extension Positional Audio Chip |
| 中文描述： | C3DX基于PCI的HRTF的3D定位音效芯片扩展 |
| 文件页数： | 17/28页 |
| 文件大小： | 512K |
| 代理商： | CMI-8738 |
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C-MEDIA ELECTRONICS INC. Tel:886-2-87731100
Fax:886-2-87732211
URL : www.cmedia.com.tw
Products and company names mentioned here are the trademarks of their respective owners.
CMI-8738/PCI-SX AUDIO Specification
Ver. 1.2
lateral sounds.
If one listens to an artificial head first without - and then with - shoulder
fitments, then it is clear that the shoulders do contribute to spatial effects in certain positions.
The shoulders provide a strong reflection from lateral sources, with a short path-length of
around 10 cm between direct sound and reflection.
The effects are most important for
side-positioned sources, especially for "height" effects, where the shoulders tend to mask
sources which move below about 30 degree depression.
2. Local, Room Reflections
In simulations, it is clear that the incorporation of first-order simulated room reflections can
help in the creation of sound images which have a "solid" nature.
However, the effects - if
accurately simulated - are relatively slight.
Experience has shown that it is primarily the
quality of the HRTFs themselves which determine the quality and solidity of the sound image.
The further addition of second-order reflections does not help significantly, because in reality,
there is a great number of reflections in the average room.
A method which does help to
recreate the acoustic experience of a room, however, is to use approximate simulations of
lateral reverb, using either 2 or 4 laterally placed "virtual" sources at, say, +-70 degrees and
80 degrees azimuth.
The quality of the sound image relates to the HRTFs used.
The quality of the room image relates to addition of reflections and reverb.
3. Psychological Cues
There are clearly psychological cues present in everyday life which work together with the
audio cues to tell us about the world around us.
For example, if you hear the sound of a
helicopter flying, you expect it to be up in the air, and not downwards.
If a dog is barking
nearby, you would expect it to be downwards.
HRTF 3D Positional Audio Technology White-Paper
相关PDF资料 |
PDF描述 |
|---|---|
| CMI8787 | High Performance PCI Audio Processor |
| CMI8788 | High Performance PCI Audio Processor |
| CMLSH2-4LSB | 0.2 A, 40 V, 4 ELEMENT, SILICON, SIGNAL DIODE |
| CMLZDA36V | 36 V, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE |
| CMO3CMC-FREQ | CRYSTAL OSCILLATOR, CLOCK, 1.5 MHz - 156.25 MHz, CMOS OUTPUT |
相关代理商/技术参数 |
参数描述 |
|---|---|
| CMI8768 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:PCI 8CH Integrated Sound Chip |
| CMI8768+ | 制造商:CMEDIA 制造商全称:CMEDIA 功能描述:PCI 8CH Integrated Sound Chip |
| CMI8787 | 制造商:CMEDIA 制造商全称:CMEDIA 功能描述:High Performance PCI Audio Processor |
| CMI8788 | 制造商:CMEDIA 制造商全称:CMEDIA 功能描述:High Performance PCI Audio Processor |
| CMI-9650C-030 | 功能描述:DC Buzzer Single Tone 2.85kHz Magnetic 2 ~ 5V 78dB @ 3V, 10cm 制造商:cui inc. 系列:CMI 包装:* 零件状态:有效 驱动器电路:指示灯，内部驱动 输入类型:DC 电压 - 额定:3V 电压范围:2 ~ 5V 频率:2.85kHz 技术:磁性 工作模式:单音调 持续时间:- 声压级:78dB @ 3V，10cm 电流 - 电源:15mA 端口位置:顶部 工作温度:-20°C ~ 60°C 认可:- 等级:- 安装类型:* 端接:* 大小/尺寸:* 高度 - 安装（最大值）:* 标准包装:50 |
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