ITEM NAME:School Physical Supplies - Acoustic Gear Description: Demonstrate the relationship between the pitch of the sound and the vibration frequency of the sound source. Three thin steel gears with 40, 60 and 80 teeth. The faster the speed, the higher the pitch. The more gears, the higher the pitch. Material: Iron Size Chart: Diameter: 7.5cm / 2.95inch Total Length: 12.5cm / 4.92inch Package Includes: 1 Piece Gear Set Note: Please allow 1-3mm measuring deviation due to manual measurement. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures. SKU: DMO0022727579015019.The faster the speed, the higher the pitch. The more gears, the higher the pitch. 1 Piece Gear Set. Material: Iron. SKU: DMO0022727579015019. Due to the different monitor and light effect,the actual color of the item might be slightly different from the color showed on the pictures.
