My immediate reaction from friends is, "Are you serious?..."
This is when I tell them that I enjoyed a 20 minute span of listening to sine waves interfering with other near-frequency sine waves. I think more people should have this mindset. Sine waves are cool right? Sure. But moving on from the opinion section.
The reason I was so enthralled with this interference is that it produces the difference pitch, or however it was labeled in class. It is almost startling when someone proves to you that there are only two sine waves produced from the speakers by turning one off. BAM. Both the frequency produced by the speaker and the perceived frequency produced by the difference drop out.
My first thoughts are: What else can you do with that difference pitch? Could you perhaps make another difference pitch along with it by interfering with it again? And again? Someone might know. With some time- I will soon know. Or maybe Dr. Twombly will just comment the answer or something to incite me to find out sooner. My second thought is: What if there are several frequencies moving higher or lower- out of synchronization with each other? What happens then? I guess we will see. Two little experiments that have either been tried and will need to be reactivated, or maybe new to some- and need to be explored further to ensure a thorough investigation.
3 comments:
Haha! Actually Logan, that there was even a difference tone at all was a mistake on my part. I chose a sweeping tone from 256 to 306 hz by chance, forgetting that a difference tone would be created. When I heard it I immediately commented on it, as it was *so* prominent. Maybe next week we will experiment with a variety of situations dealing with difference tones (along with some other acoustical effects). Ooo, Shepard's tones - you'll love those!
Sweet.
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