Then we'll see how their frequency content evolves over time by looking at the spectrogram. This leads to a second connection between the sound and its frequency content.
Simple Sounds | Cosine wave, square wave, triangle wave, & beat note | Chirp Sounds: Synthesized & Real | Slow chirp rates |
Real Sounds | Synthesized music, real piano, toy whistle & human speech |
Wideband Frequency Modulation (FM) | Fast chirp rates |
The chirp and FM sounds were generated with MATLAB. You could use them to test how well you understand the spectrogram.
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McClellan, Schafer, and Yoder, Signal Processing First, ISBN 0-13-065562-7.
Prentice Hall, Upper Saddle River, NJ 07458.
© 2010 Pearson Education, Inc.