This tool for visually-impaired users essentially turns the trackpad into a screen reader, supporting special gestures to switch between windows and audio feedback when clicking.

VoiceOver可以把trackpad从根本上变成一个屏幕阅读器，支持特殊手势切换窗口以及在点击时获得声音反馈。

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Experiments and simulations show that the proposed system can operate in audio switch frequency range without audio noise from the motor load, meanwhile, EMI can be limited to low level.

实验与仿真结果表明：该系统采用音频开关而不导致电机负载的音频噪声，同时使EMI能被限制在低电平。

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The outlook of high frequency switch power supply in application to high fidelity audio frequency power amplifier is indicated.

指出了高频开关电源在高保真音频功率放大器中广阔的应用前景。

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Spectators watch the proceedings behind soundproof glass, and receive audio on a 40-second delay so that a court security officer can switch on a white noise machine while classified information is being discussed.

BBC: Guantanamo trials: Judge orders end to secret censor

At the core of the Fidelio SoundBar are high quality TI Class-D amplifiers - with a built-in DAC - powered by a compact SMPS (Switch-Mode-Power-Supply) to provide a full digital architecture, delivering highly efficient audio amplification and premium audio quality.

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