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量化误差(quantization error)指实际模拟值同用来表示模拟值的数字之间的差别。当实际模拟值落入两个量化层次之间时,便会产生量化误差。量化将指定最为接近的层次。量化误差会在数字音响中引入噪声和失真。通常会在低电平时听到粗糙的声音,尤其是在混响衰减的时候。量化字长(quantization word length)指ADC变换器在每一采样点上所产生的比特数。如录制CD唱片时的量化字长是16bit。四分之一波长低音吸声板(quarter-wavelength basstrao)指将吸声材料悬挂在离反射面一定距离处的一种吸声器件。吸收峰值出现在吸声材料与反射表面之间的距离相当于四分之一波长以及四分之一波长的奇数倍的时候。寂静灵敏度(quieting sensitivity)为接收调谐器的技术指标,指为产生信号/噪声(S/N)比为50dB的信号时在天线两端所需的电压。比较不那么严格要求的“可用灵敏度”(usable sensitivity)。辐射图形(radiation pattern)指音箱弥散声波的方式。稀松(rarefaction)指空气密度低于标准大气压时所产生的声波。当低音发音单元的锥盆向内移动时,便会产生
The quantization error is the difference between the actual analog value and the number used to represent the analog value. When the actual analog value falls between two quantization levels, a quantization error will result. Quantification will specify the closest level. Quantization errors introduce noise and distortion into digital audio. Rough sounds are usually heard at low levels, especially when the reverb is decaying. The quantization word length (quantization word length) refers to the ADC converter in each sampling point generated by the number of bits. Such as recording CD record when the quantization word length is 16bit. Quarter-wavelength basstrao refers to a sound absorbing device that suspends sound absorbing material at a distance from the reflective surface. The absorption peak occurs when the distance between the sound absorbing material and the reflective surface corresponds to a quarter wavelength and an odd multiple of a quarter wavelength. Quieting sensitivity is the specification of the receiving tuner and refers to the voltage across the antenna required to produce a 50 dB signal / noise (S / N) ratio. Compare the less desirable requirements of “usable sensitivity.” Radiation pattern (radiation pattern) refers to the way the speaker disperses sound waves. Rarefaction refers to the sound wave generated when the air density is lower than the standard atmospheric pressure. When the cone of the bass sound unit moves inward, it will be generated