Using Spectrum analyzer in Simulink
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Howdy,
So I'm using Simulink to look at the frequency spectrum of an audio file and I'm having a hard time understanding the output plot. The plot shows frequencies higher than 20kHz which is beyond what human can hear. Am I wrong to expect the audio frequency to be within what we can listen to? Thanks in advance!
回答（1 个）
Darshan Ramakant Bhat
2017-4-17
1 个投票
As you can see the power is around -50dBm (10^-8 watt) which is very very less. So the effective signal strength is contained only within 3KHz. To see frequencies only within 3KHz, you can uncheck the "Full frequency span" and then set the span as 3KHz.
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