# What is the effect of increasing frequency on the sound wave?

If I keep the amplitude constant and up the frequency of the sound wave, what effect does just the frequency have on the quality of the sound with regard to human hearing?

Does the sound become shriller in tone?

-

## migrated from avp.stackexchange.comJan 27 at 15:10

This question came from our site for engineers, producers, editors, and enthusiasts spanning the fields of video, and media creation.

To be technically correct - only sine waves are made of a single frequency; all other sounds are made of more than one. Thus, you can't really 'increase' the frequency of a sound wave. You pitch-shift it. –  Izhaki Nov 28 '13 at 1:46
Thank you, @Izhaki. Can you tell me how you learnt all this? What's a good place to start? Is there a book that you found very useful? –  Sathyaish Nov 28 '13 at 5:19
Okay, I just got to know you've been doing this since you were young and that you've written a book on mixing audio called Mixing Audio. I also searched some more and found that for someone like me who wants to understand the basics of sound, here is a good book: amazon.com/Sound-Reinforcement-Handbook-Yamaha-Products/dp/… –  Sathyaish Nov 28 '13 at 5:37
The Sound Reinforcement Handbook is a heavyweight one. At this level I'd recommend you just browse 'Basic Sound Theory' online. –  Izhaki Nov 28 '13 at 14:59
It is the inverse of a cycle period within a signal, not the whole signal. A sawtooth contains a fundamental frequency and odd+even harmonics (frequencies that are an integer multiple of the fundamental). So it does contain more than one frequency. But yes - it is conventional to say "A 100Hz sawtooth", which really means that its fundamental is 100Hz. –  Izhaki Dec 1 '13 at 20:06