Mediaspace scheduled maintenance: Aug 25, 2026 07:00 - 12:00 AM. During this time, videos will be temporarily unavailable. Check status updates.

Lecture

Reflectogram: Understanding Audio Reflections

In course

EE-548: Audio engineering

This lecture is oriented towards the study of audio engineering, room acoustics, sound propagation, and sound radiation from sources and acoustic antennas. The learning outcomes will be the techniques for microphones and loudspeaker design, as well as room ...

Description

This lecture delves into the concept of reflectograms, analyzing the amplitude of early and late reflections in audio engineering. It explores the impact of reflections on sound quality, the threshold value for musicians and listeners, and the design rules to prevent prejudicial effects on speech and music diffusion. Additionally, it covers the temporal integration and dispersion of echoes in different room dimensions, as well as the phenomena of flutter and tonal echoes.

Instructor

Hervé Lissek

Official source

Related concepts (15)

Audio engineer

An audio engineer (also known as a sound engineer or recording engineer) helps to produce a recording or a live performance, balancing and adjusting sound sources using equalization, dynamics processing and audio effects, mixing, reproduction, and reinforcement of sound. Audio engineers work on the "technical aspect of recording—the placing of microphones, pre-amp knobs, the setting of levels. The physical recording of any project is done by an engineer... the nuts and bolts.

Broadcast engineering

Broadcast engineering is the field of electrical engineering, and now to some extent computer engineering and information technology, which deals with radio and television broadcasting. Audio engineering and RF engineering are also essential parts of broadcast engineering, being their own subsets of electrical engineering. Broadcast engineering involves both the studio and transmitter aspects (the entire airchain), as well as remote broadcasts. Every station has a broadcast engineer, though one may now serve an entire station group in a city.

Professional audio

Professional audio, abbreviated as pro audio, refers to both an activity and a category of high-quality, studio-grade audio equipment. Typically it encompasses sound recording, sound reinforcement system setup and audio mixing, and studio music production by trained sound engineers, audio engineers, record producers, and audio technicians who work in live event support and recording using mixing consoles, recording equipment and sound reinforcement systems.

Digital audio

Digital audio is a representation of sound recorded in, or converted into, digital form. In digital audio, the sound wave of the audio signal is typically encoded as numerical samples in a continuous sequence. For example, in CD audio, samples are taken 44,100 times per second, each with 16-bit sample depth. Digital audio is also the name for the entire technology of sound recording and reproduction using audio signals that have been encoded in digital form.

Sound Blaster

Sound Blaster is a family of sound cards and audio peripherals designed by Singaporean technology company Creative Technology (known in the US as Creative Labs). The first Sound Blaster card was introduced in 1989, and since then, the Sound Blaster brand has become synonymous with high-quality computer audio.

Related lectures (30)

Doublets and Dipoles: Acoustic Radiation and Directivity in Audio Engineering

Explores acoustic radiation, directivity, and superposition in audio engineering, focusing on doublets, dipoles, and cardioid sources.

Audio Engineering Fundamentals

Introduces audio engineering fundamentals, covering microphone transduction, impedance matching, and directivity control.

Loudness and Sound Level

Explores loudness, sound level, perception, scaling, and integration in audio engineering.

Sound Waves in Waveguides

Explores sound wave propagation in waveguides, room modes, and sound pressure distribution in rooms, highlighting the detrimental effects of room modes on sound reproduction.

Geometrical Acoustics: Simulation and Criteria