CSD313L_SineWaveII_Narration

# Displacement sinusoidal sound get the formula from

This preview shows page 1. Sign up to view the full content.

This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Sinusoidal Sound - Get the Formula from Plot Get How to get the formula form a plot – The key is to determine the three parameters – Amplitude (A): read directly from the graph – Frequency (f): Frequency Get the period (T) directly from the graph f = 1/T – Phase (Φ): Phase Based on where the vibration starts in the graph, get Based the phase (one of the four extreme phase conditions) the Get the formula from plot - Example Example Amplitude (A): read directly from the graph, 400 Frequency (f): Frequency – Get the period (T) directly from the graph, T = 4 ms – f = 1/T = 1 / 4ms = 1 / 0.004 sec = 250 Hz d = 400*sin(2π*250*t + π) *250*t Phase (Φ): Phase – Based on the fact that the vibration starts from the max negative Based displacement, Φ = π Sinusoidal w aves 500 400 300 A m p lit u d e 200 100 0 -100 Tone 2 0.0 0.5 1.0 1.5 2.0 2.5 -200 -300 -400 -500 Tim e (ms) 3.0 3.5 4.0 4.5 5.0 Summary Summary Vibration of air molecules – Simple harmonic motion – Uniform circular motion Physical description of SHM – Three parameters: amplitude, frequency, and phase – Plot sinusoidal wave – Write out the physical formula based the waveform plot...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online