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Aeroelasticity is the study of the interaction between aerodynamic forces and structural flexibility. Its implications on noise concern the generation of sound due to vibrating aircraft structures.

Amplitude modulation in aeroacoustics refers to the variation of noise level with time, often experienced as a 'whooshing' sound. It is relevant for assessing the nuisance of aircraft noise in communities.

A sonic boom is the sound associated with the shock waves created when an object travels through the air faster than the speed of sound. Mitigating sonic booms is crucial for the development of supersonic flight over populated areas.

SPL is a logarithmic measure of the effective pressure of a sound relative to a reference value. In aviation, controlling SPL is crucial for minimizing noise pollution and meeting regulatory standards.

In aeroacoustics, wave propagation refers to how sound waves travel through different media. Understanding this helps in predicting and mitigating noise impacts of aircraft.

A sonogram is a visual representation of the spectrum of frequencies of sound as they vary with time. In aviation, it's used to analyze the noise signature of aircraft and helps in noise mitigation strategies.

The Doppler Effect is the change in frequency or wavelength of a wave in relation to an observer moving relative to the wave source. It is significant in aviation for understanding how aircraft noise is perceived on the ground.

An acoustic liner is a material used to line aircraft engines and airframes to absorb sound energy. It's vital for reducing engine noise and improving the acoustic comfort in the cabin.

Psychoacoustics is the study of the human perception of sound. In aviation, it helps in designing aircraft noise to be less intrusive and more acceptable to the human ear.

Vortex shedding occurs when alternating low-pressure vortices are generated on the back side of an object. In aviation, it relates to noise generation and can impact aircraft performance and structural integrity.

Jet noise is generated by the high-velocity jets of air exiting an aircraft engine. Reducing jet noise is a key focus in environmental control and noise regulation.

Fan noise arises from the rotation of fan blades in turbofan engines and is a significant source of noise during takeoff and landing. Quieting fan noise is important for meeting airport noise standards.

Airframe noise is caused by airflow interaction with the landing gear, flaps, and other structural elements. Minimizing airframe noise is essential for reducing overall noise during approach and landing.

Boundary layer noise is generated by the turbulent flow of air over an aircraft's surfaces. Reducing this noise is important for the overall reduction of aircraft noise levels.