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Frequency in a Singing Glass - Coggle Diagram
Frequency in a Singing Glass
Temperature
Room
Colder = higher pitch
Hotter = lower pitch
Glass
Colder = 0°C – 5°C
Room = approx. 20°C
Hot = 50°C – 60°C
Water
Colder = 0°C – 5°C
Room = approx. 20°C
Hot = 50°C – 60°C
Body
Average body temp = 37°C
Glass
Thickness
Thicker/thinner rim
Depth/height
Deeper
Wider rim
Type of glass
Crystal
Soda-lime
Shape
Wider rim
Longer neck
Size
Large
600-900mL
Medium
350-500mL
Small
150-250mL
Rotation of finger
How quickly/slowly
Slow = quiet
Fast = louder
Amount of water on finger
Bone dry = not sing
Damp (sweet spot) = sings easily and beautifully
Dripping wet = silent or inconsistent
Pressure on finger on the glass
Very light = silent
Moderate (sweet spot) = pure, steady tone
Heavy = dead/quiet or screeching friction squeak
Water
Type
Distilled = highest frequency (lightest)
Tap = baseline
Spring = slightly lower frequency (heavier)
Saltwater = lowest frequency (heavier)
Temperature
Colder = lower frequency
Hotter = higher frequency
Amount
Empty/minimum = highest pitch
Half full = medium pitch
Full = lowest pitch
Medium in Glass
Water
Clean, sustained, standard tone
Soft drinks
Slightly lower frequency (slightly denser and heavier than water)
Black Coffee/Tea
Virtually identical to water
Milk
Lowest frequency and muffled (denser and thicker than water)
Environment
Temperature of room
Table/surface that the glass sits on
Solid wood = loud decibels
Stone, metal or concrete = clear, pure, long sustain
Plastic = lower decibels
Humidity
Low = quieter and inconsistent (finger dries too quickly)
High = sustained and effortless (perfect friction condition)
Walls/furniture
Absorption/Relfection
Empty room = high reflection
Furnished room = high absorption
Surrounding noise
Silent room = highly accurate data
Steady background noise = distorted
Sudden noise = random error