Audio
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Recognition
env 1
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env 2
env 3
env 4
env 5
Recognition • We don’t hear sound, in the sense of
recognizing them, until shortly after we have perceived them.
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Recognition
office
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env 2
env 3
env 4
env 5
Recognition
office
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train station
env 3
env 4
env 5
Recognition
office
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train station
taxi
env 4
env 5
Recognition
office
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train station
taxi
boxing arena
env 5
Recognition
office
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train station
taxi
boxing arena
bts
Anatomy of Sound • Wave • Human hearing range 20Hz - 20kHz
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Anatomy of Sound
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Anatomy of Sound
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Characteristic of Sound • Pitch • Quality / Timbre • Loudness (Sound Pressure Level)
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Pitch
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Quality / Timbre
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Quality / Timbre
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Sound Pressure Level
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Sound Envelope
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Audio and User Experience • Sound is an essential part of everyday living • Sound can deliver entertainment: music • Vital Information: traffic and news report
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Audio and User Experience • •
Audio signals help us interact with our environment Some of these signals are designed:
• • •
Alarm Clock Buzz Phone Ring
Some are not
• •
Air Conditioner Hum Car Engine Sound We notice it immediately when something doesn’t sound right
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Sound Like Success “You can tell that someone start up a PC or Mac without looking just by the distinctive sounds of their OS jingles”
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Audio’s Limited Role in UX “Rather than enhancing a user experience, audio can be a distraction and reduce our effectiveness”
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• • •
Unwanted sound can be intrusive and annoying
•
Zooming & swooshing sound accompanying animations
Invasive background music Click and beeps giving user feedback for no good reasons
Audio Usage in UX • Ambient Background Sound • Task-and Event-Based Signals • Warning and Notifications
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Ambient Background Sound “Our day-to-day lives are filled with background sound some of which we enjoy-say, ocean waves at the beach and other sounds that we strongly dislike-like construction noise” “Will people need the equivalent of a white-noise generator in their computers to raise the background sound level high enough to drown out distractions?”
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Task-and Event-Based Signals
“We often take for granted the offline audio cues that assist input to digital devices.The click of the mouse and tap-tap of the keyboard reinforce the fact that we’ve completed a particular action”
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Warnings and Notifications “Voice could be used to direct the user’s attention to important events or elements on the screen in a richer way than the obnoxious beep that currently constitute most computers’ audio vocabulary” “Because audio is intrusive, it’s best to ask for a user’s permission before using audio notifications and always provide a clear way of disabling the audio”
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Principles of Sound Design • Synchresis • Acousmatic • Extension (of sound space) • Empathetice • Anempathetic sound Friday, August 2, 13
Synchresis • This comes from the two tords “synchronism” and “synthesis”
• Mental fusion between a sound and a visual when these occur at exactly the same time
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Acousmatic • The sound one hears without seeing their originating cause
• Invisible sound source
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Extension (of sound space) • Build the image an environment • Beyond the borders of visual field • Or withing the visual field filed around the characters
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Empathetic • Music or sound effects whose mood matches the mood of the action
• the ability to feel the feeling of others • Like sadness, happiness and movement
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Anempathetic • Usually diegetic music that seems to exhibit conspicuous indifference to what is going on in the film’s plot
• Creating a strong sense of tragic
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