acceptance angle
![acceptance angle](../../images_music/acceptance_angle.jpg)
Acceptance angle of cardioid microphone.
The acceptance angle is the angle from the axis of a unidirectional microphone that defines its usable working area. A cardioid microphone, for example, has a 120° acceptance angle. Hypercardioid microphones extend the working distance farther, with their 100° acceptance angle, providing greater rejection of sound from the sides. Outside the acceptance angle, microphone sensitivity is reduced.