Squeal may refer to: *A term for providing privileged information about a person or an agency, usually performed by an informant * "Squeal" (song), song by No Doubt *

Brake squeal A disc brake is a type of brake that uses the calipers to squeeze pairs of pads against a disc or a "rotor" to create friction. This action slows the rotation of a shaft, such as a vehicle axle, either to reduce its rotational speed or to hold ...

, sound created by a disc brake *

Rail squeal Rail squeal is a screeching train-track friction sound, commonly occurring on sharp curves. Squeal is presumably caused by the lateral sticking and slipping of the wheels across top of the railroad track. This results in vibrations in the wheel ...

, sound created by a train braking on a railroad track

See also