The AKG D 7 is a supercardioid dynamic microphone. It has been designed specifically as a vocal microphone for rough onstage use. The wide frequency response of the D 7 slightly favors the midfrequency and treble regions to ensures good intelligibility of speech. The term "supercardioid polar response" means that the D 7 is most sensitive to sound arriving from in front of it, less sensitive to sound arriving from the sides and rear. This pickup pattern is virtually the same for all frequencies or, in other words, from the lowest to the highest notes ("frequency independent").
A mechanical/pneumatic shock mount on the transducer element minimizes handling and cable noise. An integrated windscreen reduces pop, wind, and breath noise to a minimum. A built-in humbucking coil and 80-Hz high pass filter will effectively suppress any other kind of unwanted low-frequency noise. The filter is permanently active. Therefore, the microphone has no separate on/off switch for the highpass filter. A rugged front grill made of spring-steel wire mesh that is extremely resistant to deformation and a sturdy zinc alloy die-cast body effectively protect the microphone and transducer element from damage on stage and on the road.