- Dummy head
noun 1. a model of the human head with a microphone in each ear intended to receive sound in binaural and surround sound reproduction and transmission
noun 1. a slot cut into a concrete slab to prevent serious fractures.
- Dummy load
noun 1. a resistive component that absorbs all the output power of an electrical generator or radio transmitter in order to simulate working conditions for test purposes
- Dummy run
noun 1. a practice or rehearsal; trial run