B型超聲

型 = 刑 + 土 : Marie Curie (xi) is carving a mould (型) out of a lump of earth (土) using a pocket knife (刑) in the engine's kitchen ((e)ng2). She wants to use it to model (型) the stones in the engine.

超 = 召 + 走 : Charlie Chaplin (ch) invited an internet friend to come over for a walk (走), but as his friend arrives at the aorta's and is standing in front of it (ao1) Charlie is shocked. He finds that his friend is a red super giant (超; 红超巨星) and brought nordic walking sticks (走). The red super giant keeps calling Charlie over the intercom (召), but Charlie is unable to answer.

声 = 士 + 尸 + 丨 : Sherlock Holmes (sh) hears the terrifying sound (声) of bone (丨) on stone in front of the engine ((e)ng1), and he's sure that there must be a ghost (尸). Indeed it's only the bachelor (士) who wants to scare Sherlock.