STEM与日常科技·英语精读30篇（5）
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Audio Bitrate Choices in Remote Collaboration Tools: Sampling Theory in Practice
远程协作工具中的音频码率选择：采样定理的实际应用
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Zoom and Teams default to 48kbps Opus encoding, sufficient for speech intelligibility but insufficient for accurate prosody in multilingual team settings.Zoom 和 Teams 默认采用 48kbps 的 Opus 编码，足以保证语音可懂度，但在多语种团队环境中无法准确还原韵律。
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According to Nyquist–Shannon theory, human voice energy peaks below 4kHz, yet emotional cues like stress or hesitation rely on harmonics up to 7kHz—lost at low bitrates.根据奈奎斯特-香农采样定理，人声能量集中在 4kHz 以下，但压力、犹豫等情绪线索依赖高达 7kHz 的泛音——低码率下这些信息会丢失。
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Network-constrained users experience increased cognitive load when subtle vocal cues disappear, leading to longer meeting durations and more follow-up messages.网络受限用户在细微语音线索消失时认知负荷增加，导致会议时间延长、后续沟通消息增多。
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Adaptive bitrate switching helps, but abrupt transitions between 12kbps and 48kbps create perceptual dissonance—listeners subconsciously question speaker credibility.自适应码率切换虽有帮助，但 12kbps 与 48kbps 之间的突变式切换会造成听觉不协调感，听众会下意识质疑说话人可信度。
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Enterprise IT departments now benchmark tools not just on MOS scores, but on speaker recognition accuracy and turn-taking fluency under variable bandwidth.企业 IT 部门如今评估通信工具，不仅看平均意见得分（MOS），更关注带宽波动下的说话人识别准确率和话轮转换流畅度。
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The real-world implication is clear: audio isn’t 'just speech'—it’s a carrier of social coordination signals that sampling choices directly modulate.现实影响显而易见：音频不只是‘语音’，更是社会协作信号的载体，采样方式直接影响其传递效果。