Grandma Moon Speaks: Harmonics

Topics Covered: Harmonic Fundamental Frequency Harmony I don’t know anything about music. In my line you don’t have to – Elvis Presley You might be thinking: So far every property we’ve seen about sound is subjective. How do people get a handle on it, then? Especially a mathematical handle. We get our ‘math fix’ with […]

Grandma Moon Speaks: Timbre and Duration

Topics Covered: Timbre Duration Spectrum and Envelope Rhythm After silence, that which comes nearest to expressing the inexpressible is music – Aldous Huxley Sounds are complex waves: It is this complexity that gives us so much variety. Otherwise everything would sound like the ring tones from the first mobile phones! Question to ask yourself: If […]

Grandma Moon Speaks: Pitch and Tone

Topics Covered: Pitch Tone You can actually have a pitch button, you know, to get people on pitch – Helena Bonham Carter   Are some frequencies more important than others? That’s the question one needs to ask if one wants to understand Pitch. Pitch is a sensation. Different frequencies affect us differently, and we assign […]

Grandma Moon Speaks: Frequency Range of the Human Ear

Topics Covered: Audible Range of the Human Ear Audio or Sonic Range Ultrasonic and Infrasonic Frequencies I remember attaching a wire clothing hanger to the antenna of my radio in my bedroom, so I could get the frequency and get that station and listen to the top 10 every night – Nelly Furtado The average […]

Grandma Moon Speaks: The Human Ear Part 2

Topics Covered: The Cochlea Semi-circular Canals Music doesn’t lie. If there is something to be changed in this world, then it can only happen through music – Jimi Hendrix Now you can take a look at how the ear is designed without getting dizzy: The inner ear has two portions – the Semi-circular Canals and […]

Grandma Moon Speaks: The Human Ear Part 1

Topics Covered: The 3 Regions of the Human Ear The Pinna and the Auditory Canal The Ear Drum One good thing about music, when it hits you, you feel no pain – Bob Marley If the eye is designed for just one thing – sight, then the ear is designed for three – hearing, balance […]

Notes by Dr. Optoglass: The Megapixel Counts of the Human Eye

Topics Covered: The Megapixel Count of the Human Eye Rule of Thirds? Whenever I arrive on a real location, I have to move around and work out what the best angles are going to be. When I was moving around with the lens, I discovered things that the naked eye would not have – Pedro […]

Notes by Dr. Optoglass: Airy Disk and Pixel Density of the Human Eye

Topics Covered: The Airy Disk Diffraction Pixel size of the Eye Pixel density or resolution of the Eye Everybody thinks they know what art should be. But very few of them have the sense that is necessary to experience painting, that is the sense of sight, that sees colors and forms as living reality in […]

Notes by Dr. Optoglass: The Resolution of the Human Eye

Topics Covered: The average and maximum resolutions of the human eye PPI and DPI at various distances Beauty is all very well at first sight; but who ever looks at it when it has been in the house three days? – George Bernard Shaw Exclusive Bonus: Download my free cheatsheet (with examples) of the most […]

Notes by Dr. Optoglass: Focal Lengths of the Human Eye

Topics Covered: The many focal lengths of the eye The focal length of the eye in photographical terms Nature will bear the closest inspection. She invites us to lay our eye level with her smallest leaf, and take an insect view of its plain – Henry David Thoreau Before you get the wrong impression, let’s […]