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Old Oct 7th 2014, 06:26 AM   #1
MLN
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Can you calculate the frequency of these 2 waves?

Hey guys.

I'm new to Acoustics and I'm still trying to understand some basic concepts about the interpretation of histograms.

I've been presented with 2 histograms (attached as an image to this post), and the basic question I'm asked is "can you determine the frequency of the sound waves?"

Now, to me both these graphics seem to kinda repeat themselves, meaning that each oscillation is evenly distributed in time, but each one with slight variations. To me that looks like a sound wave with the same frequency (calculable), but with variations in amplitude and harmonic content.

Can someone clarify this for me? Thanks a lot!
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Can you calculate the frequency of these 2 waves?-freq.jpg  
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Old Oct 7th 2014, 02:47 PM   #2
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Originally Posted by MLN View Post
Hey guys.

I'm new to Acoustics and I'm still trying to understand some basic concepts about the interpretation of histograms.

I've been presented with 2 histograms (attached as an image to this post), and the basic question I'm asked is "can you determine the frequency of the sound waves?"

Now, to me both these graphics seem to kinda repeat themselves, meaning that each oscillation is evenly distributed in time, but each one with slight variations. To me that looks like a sound wave with the same frequency (calculable), but with variations in amplitude and harmonic content.

Can someone clarify this for me? Thanks a lot!
I agree with you that the plots are not perfect harmonic waveforms and that the exercise is a bit silly.

However, is it possible you are over-thinking it and they just want a rough value for the frequency? They aren't large variations...maybe you are supposed to ignore them.

-Dan
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