Hamasaki Square
by Kimio Hamasaki, NHK, Japan
The Hamasaki Square is designed for capturing the ambient/diffuse part of a surround sound recording. It's a four microphone square with 2-3 m between the figure-of-eight microphones, which are routed to left, right, left surround and right surround in appropriate level compared to the front array. The figure-of-eight microphones are pointed with their in-phase sensitive directions against the sides and with their nulls to the direct sound:
