EE4209 Digital Audio Technology
from the science of digital media by Jennifer Burg , page 200 :
1. Sampling rate relates directly to the frequency of a wave.
2. Quantization relates more closely to the amplitude of a sound wave.
3. Amplitude measures the intensity of the sound and is related to its perceived loudness.
4. A decibels is not an absolute unit of measurement. A decibel is always based upon some agreed-upon reference point.
For sound, the reference point is the air pressure amplitude for the threshold of hearing. A decibel in the context of sound pressure level is called decibels-sound-pressure-level (dB_SPL)
超時空要塞 Macross 《可曾記得有愛》
http://www.youtube.com/watch?v=L-Vy_husiyo
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