Absorption
A packet runs down the incident ray into a layered absorber and leaves along the reflected ray at lower strength.
CSS
Acoustic
15 animationsBeat frequency
Two tones drift through a wavelength of relative phase while the meter beside them reads their sum rising and cancelling.
CSSDirectivity pattern
A measuring arm walks a polar plot while the radiation lobe narrows and opens again with frequency.
CSSDistance attenuation
Wavefronts leave the source, spread wider as they travel and fade against the six-decibel-per-doubling ladder.
CSSDoppler shift
A source runs past a fixed observer while the wavefronts it emitted expand from where it was, bunching ahead of it and spreading behind.
CSSHarmonic series
Partials arrive one after another above a held fundamental, filling out the spectral envelope that gives the tone its timbre.
CSSNoise floor
A signal bar climbs clear of a restless noise floor and holds the margin marked by the bracket.
CSSPressure waveform
A sound pressure trace runs steadily past the zero rule and its time ticks, one wavelength per cycle.
CSSPulse-echo
A burst leaves the transducer, reflects off the boundary at depth and climbs back up the beam as an echo.
CSSResonance peak
A swept drive tone crosses the frequency axis and the response bar rises to its maximum as it passes the natural frequency.
CSSReverberation decay
An energy curve draws itself down from the impulse to the decay rule, marking the reverberation time on the axis before the room clears.
CSSRoom mode
A standing wave in a room plan swings between its walls while the two pressure nodes hold still.
CSSSound pressure level
A level meter tracks sound pressure across a dB scale while a peak-hold tick latches at the loudest reading and decays.
CSSSpectrogram
A time-frequency map scrolls steadily past the frequency axis, each cell holding the energy in one band at one instant.
CSSThird-octave spectrum
Twelve frequency bands rise and settle across a level grid, the spectrum shape holding while each band breathes on its own phase.
CSS