The data he compiled yielded a mathematical formula for the relationship between a room's echo duration, its quantity and quality of sound-absorbing materials, and its spatial volume.

他收集的数据得出了一个关于房间回声持续时间、吸音材料的数量和质量以及空间体积之间关系的数学公式。

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Thanks to noise-cancelling and echo-reducing technology, call quality is sharp and clear, and it will automatically pause whatever music you’re listening to when a call comes in .

该系统采用了减噪和降低回声的技术，因此通话质量十分清晰。 当有电话打进时，将自动暂停正在播放的歌曲。

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IntroductionIn the communication systems, echo and noise will seriously affect speech communication quality, such as IP telephone, videophone and hand-free digital cell phone systems etc.

引言在通信系统中，例如IP电话、可视电话及免提数字蜂窝电话系统中，回声和噪声会严重影响通信质量。

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Initially, the call quality was merely bad , static-y and echo-y.

FORBES: (Updated) Review: netTALK Duo Underwhelms on Voice Quality

The card also includes a high-quality beam-forming microphone, which leverages CrystalVoice Echo Cancellation, CrystalVoice Focus and CrystalVoice Active Noise Reduction to enable gamers for the first time ever to use speakers and a desktop microphone while gaming without any sound other than the gamer's voice being transmitted through the microphone.

ENGADGET: Creative doles out Sound Blaster gaming headsets, Recon3D audio platform / sound cards

This card also includes the high-quality beam-forming microphone, allowing advanced voice communication without the need for the headset by leveraging CrystalVoice Echo Cancellation, CrystalVoice Focus and CrystalVoice Active Noise Reduction.

ENGADGET: Creative doles out Sound Blaster gaming headsets, Recon3D audio platform / sound cards