A microphone with a directional response pattern described by (1 + cosϕ), where ϕ is the angle of incidence of the sound. Such a pattern can be considered to be the combination of an omnidirectional microphone response (1 all round) and a figure-eight microphone response (cosϕ). The overall response is approximately heart-shaped (see diagram), hence the term cardioid. Practically, such a response is difficult to achieve for frequencies above which the wavelength becomes comparable with the physical dimensions of the microphone itself.
Idealized directional response of a cardioid microphone (scale in degrees)
- random-access memory
- random-access stored-program machine
- random algorithms
- random alloy
- random cascade model
- random coefficient model
- random digits
- random effects
- random error
- random event
- random forest
- random graph
- randomization
- randomize
- randomized blocks
- randomized blocks design
- randomized response
- random logic
- randomly amplified polymorphic DNA
- random man not excluded
- random match probability
- random matrices
- randomness
- random number
- random numbers