background noise

• A bit of background noise on the phone enables our ears to filter out echoes
  电话中稍加一点背景噪音，我们的耳朵就听不到电话中的回声。
• Scenario 5 had no music or ambient sounds ( background noise , like birds and wind )
  场景5缺少音乐或者环境音（背景音，比如鸟叫或者风声） 。
• However , they are only sensitive to waves from specific sources and have lots of background noise
  但它们只对特定的有大量背景噪音的引力波源敏感。
• Reports of protests here and there have become part of the background noise of urban life
  此起彼伏的关于抗议的报道已经成为城市生活背景噪音的一部分。
• Coupling ipo with fdtd , we pick up " background noise " to improve numerical value precision
  在ipo和fdtd之间场耦合中，通过提取“本低噪声”方法提高数值精度。
• One american complained that the hazard alarms didn ' t seem loud enough against the background noise
  还有一位组员竟然抱怨，在那种背景噪音中，警报器的声音不够响亮。
• Conventional hearing devices amplify everything ? from conversations to background noise to the clock ticking
  一般的助听器会放大所有的声音?言语声、背景噪声和钟声等。
• What this means is that the active speaker s voice is clearly transmitted , while minimizing background noise
  这代表讲者的声音可以清晰地传送,而且背景的声音会降低至最低。
• Reduce background noise . sit face - to - face with patient . keep good eye contact and listen attentively
  减少附近噪音，与患者面对面坐，保持视线接触及细心聆听，用简单问题引导患者。
• These failures were most likely the result of excessive background noise and distortions in the frequency of the songs
  这几次失败最可能是因为背景的噪音太吵，以及歌曲的频率失真。