Howtosignalprocessing
- What does a square wave sound like?
- What is the meaning of square waves?
- What is the FFT of a square wave?
- What is the frequency of a square wave?
What does a square wave sound like?
A square wave is piercing, like a smoke alarm. A triangle wave sounds rather brassy. The random wave sounds like white noise. A sound with a regular pattern has a fundamental frequency which is the number of peaks in the waveform per second.
What is the meaning of square waves?
Square waves (also referred to as cross sea, or squared sea) are a rare ocean phenomenon caused by two ocean swells colliding perpendicular to one another. These waves are often formed at peninsular's of land where two different seas or oceans meet.
What is the FFT of a square wave?
In the frequency domain, the overall average of a signal is its content at DC or 0Hz -- so that's why there's a peak at 0Hz. The FFT of a square wave that is centered on 0V has energy at every odd harmonic, starting at 1.
What is the frequency of a square wave?
A square wave is approximated by the sum of harmonics. In this particular SPICE simulation, I've summed the 1st, 3rd, 5th, 7th, and 9th harmonic voltage sources in series for a total of five AC voltage sources. The fundamental frequency is 50 Hz and each harmonic is, of course, an integer multiple of that frequency.
