Mode locking: Optics, Laser, Light, Phase (waves), Normal mode, Resonant cavity, Interference (wave propagation)

Beamforming: Omnidirectional, Signal processing, Sound waves, Interference (wave propagation), Antenna (radio), Sonar Projector, Hydrophone

Flanging: Flanging, Sound effect, Comb filter, Phaser (effect), All-pass Phase response, Interference (wave propagation)

Optical Waves in Crystals: Propagation and Controlof Laser Radiation (Wiley Series Pure Applied Optics)

Interference of Light: Wave Optics, Coherence, and Optical Path Concepts: Easy Physics...