Inner ear Is the ancient part of the ear ... longer than that of reptiles. In mammals, a cartilaginous pinna is usually present about the external opening to amplify and channel sound waves. Evolution ...

To test whether humans still use auricular muscles — which once helped move our primate ancestors’ ears to funnel sound — scientists attached electrodes to the sides of people’s heads, and asked them ...

They explained that the muscles helped change the shape of the pinna, or the shell of the ear, funneling sound to the ...

and the inner ear (see graphic). The outer ear consists of a pinna and an external auditory canal and is responsible for funnelling sound waves into the ear. The middle ear has an eardrum and ...

The ear can detect a time difference as slight as 30 microseconds ... The first chart (left) shows the delays (in microseconds) caused by reflections from the inner pinna ridge which determine ...

Most of these cancers start in the skin of the outer ear. Cancers that develop inside the ear, known as the middle and inner ear, are rare. The outer ear is the part of the ear we can see. It protects ...