acoustic spectrum [声] 声谱 ; 音谱
acoustic emission spectrum 声发射频谱
acoustic spectrum analysis 声谱分析
combustion acoustic spectrum 燃烧音频域
whole blood photo acoustic spectrum 全血光声谱
design of photo-acoustic spectrum device 光声光谱仪设计
Broadband Acoustic spread spectrum 公司采用宽带扩谱技术 ; 宽带扩谱技术
acoustic power spectrum control 声场功率谱控制
This sound spectrum spans about ten octaves. The top five octaves correspond to acoustic waves-the primordial sound of the universe, just 380,000 years into its existence.
这个声谱约有十个八度的跨度。前五个八度音阶与声波一致——仅存在了38万年的宇宙原声。
These unusual properties generally have to do with manipulating electromagnetic (EM) or acoustic waves; in this case, it is EM waves in the infrared spectrum
这些与众不同的性质一般都与控制电磁波或声波有关；在这种情况下，电磁波是处于红外波段的。
Road traffic noise reducing devices. test method for determining the acoustic performance. part 3 : normalized traffic noise spectrum.
道路交通噪音减弱装置。声性能测试方法。 第3部分： 正常交通噪音范围。
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