Cotton wool is NOT good for hearing protection as it only has an average attenuation of 7dB whereas you require 25-30dB in an average metal workshop for proper protection. DO NOT use cotton wool as hearing protection EVER. If one tiny little cotton fibre gets left behind you're in trouble - ear infection on the way!
an ear drum!
a model of a ear
Tone is a pure sound. Typically, a fixed frequency makes a single tone. In the ear (human) a tone stimulates (there are restrictions) only one part of the ear. What is tone in ear?
middle ear In your ear, it is the smallest muscle in the human body, it stabilizes the smallest bone in your body the 'Stapes.'
The average diameter of a toothpick is about 2 millimeters.
The outer ear flap 'pinnae' surrounds each hole in the side of the skull and leads into the ear canal. This irregular cylinder averaging 6mm diameter and approx 25mm long narrows slightly, then widens towards its inner end, which is sealed off by the ear-drum.
An average dwarf galaxy is small in diameter.
Quasars can vary in size, but on average they have a diameter of about 1 light-year.
it is 32cm in diameter
About 100 light-years in diameter.
The average diameter of a dwarf spheroidal galaxy is 10 kiloparsecs.
Between species the diameter of the bronchi and bronchioles vary greatly. The average length of the adult bronchus is 2.5 cm and its average diameter is 13 mm.
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Ear spacers, also known as ear gauges or tunnels, are a type of body jewelry worn in stretched ear piercings. They come in various sizes and materials, and are used to gradually stretch the earlobe to the desired diameter.
Dione has an average diameter of about 1,123 kilometers.
The average diameter of an iris is 11.8mm, with the majority of the population falling between 10.2mm and 13.00mm, on the larger end.