Physical/Perceptual dimensions

Question 0

What are the physical dimensions of light and sound and their perceptual correlates?
Perceptual dimensions definition

Answer 0

These are mental experiences that occur inside the mind of the observer.
These experiences are actively created by the sensory system and brain based on an analysis of the physical properties of the stimulus.
Perceptual dimensions can be measured, but not with a meter.
Measuring perceptual dimensions requires an observer (e.g., a listener)

Question 1

What are the physical dimensions of light and sound and their perceptual correlates?
Physical dimensions definition

Answer 1

Aspects of a physical stimulus that can be measured with an instrument (e.g., a light meter, a sound level meter, a spectrum analyzer, a fundamental frequency meter, etc.)

Question 2

What are the physical dimensions of light and sound and their perceptual correlates?
Sound dimensions (3)

Answer 2

1. Frequency (speed of vibration) –> Pitch (perceptual)
   Higher frequencies = higher sounds
2. Intensity and amplitude (size of vibration) (physical) –> loudness (perceptual)
   Higher amplitude or intensity = louder sounds
3. Spectral envelope or amplitude envelope (amplitude of sound over time, the way a sound is turned on or off – attack time, decay, sustain, release) (physical) –> Timbre (aka sound quality) – distinguishes different types of sounds with same pitch and loudness (perceptual)

Question 3

What are the physical dimensions of light and sound and their perceptual correlates? 
Light dimensions (3)

Answer 3

Wavelength (photons = electromagnetic energy) of visible light spectrum (physical) –> Hue or color (perceptual)
Luminance (intensity or amplitude of energy output of a visible light source) (physical) –> Brightness (perceptual)
Purity (mixture of wavelengths) (physical) –> Saturation (perceptual)