Quadraphonic Sound Recording.
Select the required microphone directivity pattern.

This will give you access to a number of quadraphonic microphone arrays,
one being an equal segment configuration of 90° for each segment,
and four other unequal segment coverage configurations.    (Return to HOME PAGE )

Hypocardioid

Cardioid

Supercardioid

-10dB at 180°

-6dB at 90°

-11.5dB at 180°