Willx
New Head-Fier
- Joined
- Nov 3, 2011
- Posts
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- 10
Nope
does it really matter what headphones you use?
> music is all about frequencies interacting with each other
Frequencies don't "interact" with each other. Okay, so I understand what you're saying. It may be intuitive to think that by "combining" the ultrasonic frequency with the other frequencies, it would make a difference in sound, since the signal is different. However, you'll get the same result as if you were listening to that ultrasonic frequency on its own.
Firstly, any naturally-occurring signal can be exactly represented by a linear combination of periodic complex exponential signals (technically harmonically-related). You don't have to completely understand what that means -- just that a naturally-occurring signal is made up of fundamental signals that have their own frequency. Kind of like the 22 kHz tone. Our ears process signals (sound waves) as if they were dealing with those fundamental frequencies independently. A 22 kHz frequency component, whether it is on its own or superimposed with other frequencies, is treated the same. Indeed, the way we perceive sound is the same as how a filter works.
Thank you, thats rather neat to know and im pretty sure I get what your saying. Is it possible however for frequencies to sort of modulate other frequencies. So say I was listening to 9kHz and then added 13kHz, would the combined signal really still be just 9 & 13kHz or something closer to 8 & 14? These things come to mind because I remember from my SAE course that you can can cancel out a pure sine wave by copying it and phase shifting it, then playing them together, establishing at least that there is some interesting interactions between frequencies
I like answers that are so complex it makes people not want to ask questions any more.