Sound Waves – Properties, Behavior & Applications Explained | Chapter 16 of University Physics
Sound Waves – Properties, Behavior & Applications Explained | Chapter 16 of University Physics Chapter 16 explores how sound waves propagate through different media and manifest in phenomena like resonance, interference, beats, and the Doppler effect. You’ll learn the basics of longitudinal mechanical waves, how we measure and perceive them, and their critical applications in acoustics and engineering. Watch the full video summary here for detailed explanations and demonstrations. What Is a Sound Wave? Longitudinal wave: particles oscillate parallel to wave propagation. Audible range: 20 Hz to 20 kHz (infrasonic below, ultrasonic above). Phase relation: pressure and displacement are 90° out of phase. Pressure wave model: p(x, t) = B k A sin(kx – ωt). Speed of Sound In fluids: v = √(B/ρ), where B is bulk modulus. In solids: v = √(Y/ρ), with Y Young’s modulus. In gases: v = √(γRT/M), rising with temperature. Wavelength relation: λ = v/f. ...