Acoustics, Recording & Sound Control

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Abstractions about sound generation and propagation, room acoustics, recording systems, perceived loudness, audio effects, and feedback or reverberation control.

17 abstractions in this family — domain-specific abstractions that sit near one another in structural-signature space (k-means over structural-signature embeddings). Each is shown with its short description.

• Absorption (acoustics) — The conversion or transfer of incident sound energy within a material or structure so that less acoustic energy is reflected back into the originating medium.
• Adaptive feedback cancellation — An electro-acoustic control method that continually estimates a time-varying feedback path and subtracts its predicted contribution to suppress howling while preserving the desired signal.
• Audio Stream Input/Output — Steinberg's low-latency audio-driver protocol that connects professional applications directly to multichannel audio hardware while bypassing much of the operating system's ordinary mixing path.
• Binaural recording — A two-channel recording method capturing ear-specific acoustic cues so headphone playback recreates three-dimensional directional hearing.
• Double-system recording — A motion-picture production workflow that records picture and production sound on separate devices and synchronizes them through shared references and identifiable takes.
• Infrasound — Acoustic waves below the conventional lower frequency limit of human hearing, generally taken as 20 hertz.
• Lighthill's eighth power law — An aeroacoustic scaling law stating that far-field sound power from compact low-Mach turbulent flow scales with the eighth power of characteristic velocity.
• Loudness — The auditory percept ordering sounds from quiet to loud, related nonlinearly to sound pressure, frequency, spectrum, duration, context, and listener.
• Mix automation — A recording workflow that stores time-aligned changes to mixer controls and replays them reproducibly during an audio mix.
• Proximity effect (audio) — The low-frequency boost produced when a sound source moves close to a pressure-gradient directional microphone.
• Reverberation — Persistence and gradual decay of sound caused by a dense succession of reflections arriving after the direct sound.
• Room modes — The discrete acoustic resonances of an enclosure determined by boundary conditions, geometry and sound speed.
• Sonic boom — The impulsive sound heard when shock waves generated by supersonic motion pass an observer, often exhibiting a characteristic pressure-rise and fall signature.
• Sound effect — A created, recorded or processed sound used to carry narrative, environmental or expressive meaning in media or performance.
• Statistical energy analysis — A high-frequency vibroacoustic modeling method that represents a complex structure as coupled subsystems exchanging average modal energy.
• Subharmonic synthesizer — An audio processor that analyzes an input's low-frequency content and generates phase-related components at integer submultiples of detected fundamentals to extend perceived bass.
• Ultrasound Identification — An indoor real-time locating approach in which tagged people or objects emit coded ultrasonic signals received by room sensors to infer identity and location.