Hamman's sign

It may also be audibly recognized as Hamman's sign.

Hamman's sign, a sound of crackling that occurs in time with the heartbeat, may also accompany TBI.

Hamman's syndrome can cause Hamman's sign.

Conditions which carry his name: Hamman's sign, Hamman's syndrome and Hamman-Rich syndrome.

Hamman's sign (rarely, Hammond's sign or Hammond's crunch) is a crunching, rasping sound, synchronous with the heartbeat, heard over the precordium in spontaneous mediastinal emphysema produced by the heart beating against air-filled tissues.