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The Human: Sound and hearing
 

The Human: Sound and hearing

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Slides for HCICourse.com

Slides for HCICourse.com

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    The Human: Sound and hearing The Human: Sound and hearing Presentation Transcript

    • the ear and sound
    • soundssecond sense? particularly important for speechless used in user interfaces partly because annoying for others because less directional more diffuse strength and weakness
    • the spectrum of soundssounds vary in: pitch (frequency) volume timbre ... the ‘shape’ violin vs. big bass drum
    • the earsensitive from ~20Hz to ~ 20KHzchanges with ageingbalance organs also in the inner ear image: http://en.wikipedia.org/w/index.php?title=File:Anatomy_of_the_Human_Ear.svg
    • two ears and the pinnatwo ears stereo sound => left-right detectionpinna (visible ear!) directional changes shape of sound => full 3D sound image:
    • time and spacevision: movie or static picturesound: no ‘static’ sound always about changevibration, movement, pressure waves
    • time and spacebinaural hearing distance between ears ~ 30 cm speed of sound ~ 340 ms delay left–right ~ 1 ms
    • time and spacewavelengths middle C in piano frequency: 261.6 Hz wavelength ~ 1.3 metres, 4 ½ feet affects propagation in spaces, resonance
    • in the interfacesimple sounds (beep, ring, and buzz) attention grabbing and feedbackecological (thump and gurgle) what is happeningspeech and music: recorded (download & play) live (streaming movie) delays, gaps, interactive (Skype and video calls) and jitter
    • the phone ...multi-tap with simulated key click to type f = ddd three ‘d’ presses kept doing four but only with sound on(delayed) aural feedback overcame physical feel
    • setting the moodthe movie soundtrack may not notice at the timeengagement in video games and VR the sub-seat woofer!
    • attention and backgroundcan focus aural attention the cocktail party effectbut also general sense of context Arkolaand can grab attention big bang or softly whispered name