基础声学与声音讯号处理_ch1.pdf

Fundamentals of Acoustics and Speech Signal Processingand Speech Signal Processing / 1-EFG/EM104 () Department of Mechanical Engineering • What is sound? – Department of Mechanical Engineering • Waves – – Department of Mechanical Engineering • Frequency – f Herz Hz –– – 20Hz~20kHz – Fender 41Hz 3300Hz 4186Hz 20kHz Department of Mechanical Engineering • Velocity – 21.1 °C 1130 / 344.4 / –– 3566 / 5486 / – Department of Mechanical Engineering