FM waveforms

The WAV files on this page are intended to demonstrate the process of frequency modulation (FM) at frequencies that humans can experience.

A good way to examine each file is to play it in an application that generates sound and shows the waveform as voltage-over-time. Once such application is Microsoft's Windows Media Player with the Visualization set to Bars and Waves : Scope.

Waveform	Modulation index	Frequency	File size	Duration
Carrier signal		`250 Hz`	`16 kb`	`4 s`
Modulating signal		`1 Hz`	`16 kb`	`4 s`

FM waveform	`10`	`240-260 Hz`	`16 kb`	`4 s`
FM waveform	`25`	`225-275 Hz`	`16 kb`	`4 s`
FM waveform	`50`	`200-300 Hz`	`16 kb`	`4 s`
FM waveform	`100`	`150-350 Hz`	`16 kb`	`4 s`
FM waveform	`200`	`50-450 Hz`	`16 kb`	`4 s`

Copyright © 2006 Michael X. Lyons All rights reserved.