Acoustics of Speech and Hearing, Fall 2004

Abstract:: Provides acoustical background necessary to understand the role of sound in speech communication. Analyzes constraints imposed by the properties of sound and human anatomy on speech production (sound production from airflow and filtering by the vocal tract); auditory physiology (transformation of acoustical waves in the air to mechanical vibrations of cochlear structures); and sound perception (spatial hearing, masking, and auditory frequency selectivity). The Acoustics of Speech and Hearing is an H-Level graduate course that reviews the physical processes involved in the production, propagation and reception of human speech. Particular attention is paid to how the acoustics and mechanics of the speech and auditory system define what sounds we are capable of producing and what sounds we can sense. Areas of discussion include: 1. the acoustic cues used in determining the direction of a sound source, 2. the acoustic and mechanical mechanisms involved in speech production and 3. the acoustic and mechanical mechanism used to transduce and analyze sounds in the ear

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Swarms of Small Autonomous Robots: A Future Vision for Ocean Observation

Abstract:: One of the biggest challenges scientists face when studying the ocean is observing the interplay between physical processes and biology in fine detail. Join Jules Jaffe, a research oceanographer in Scripps' Marine Physical Laboratory, as he describes his latest scheme to uncover these processes with swarms of inexpensive, miniaturized robotic floats that travel with currents, sense the environment and report their findings back to us. (58 minutes)