<p align="right">Last Update: <font color="#4f81bd">January 02, 2025</font></p> ## BIG IDEAS - Sound intensity is the power of sound per unit area. --- ### Textbook Alignment Walker 14-5 Sound Intensity ### SI Unit - SI unit is watt per meter squared. ### Formula The formula for intensity of sound waves is an inverse square law. $I = \frac{P}{4 \pi r^2} \tag{1}$ Where $I$ is intensity, $P$ is power given in Watts ($W$), and $r$ is distance. ### Slide Deck <div style="position: relative; width: 100%; height: 0; padding-top: 56.2500%; padding-bottom: 0; box-shadow: 0 2px 8px 0 rgba(63,69,81,0.16); margin-top: 1.6em; margin-bottom: 0.9em; overflow: hidden; border-radius: 8px; will-change: transform;"> <iframe loading="lazy" style="position: absolute; width: 100%; height: 100%; top: 0; left: 0; border: none; padding: 0;margin: 0;" src="https://www.canva.com/design/DAGPwK4ACjA/FEuBRHEi7o5O1llQ9amhYQ/view?embed" allowfullscreen="allowfullscreen" allow="fullscreen"> </iframe> </div> ### Related Topics --- [[Home|Home]] | [[Oscillations]] | [[Waves]] | [[Module 0 Sound]] | [[Module 1 Sound Waves]] | [[Module 2 Speed of Sound]] | [[Module 3 Sound Intensity]] | [[Module 4 Doppler Effect]] | [[Electromagnetic radiation]]