Ambisonics - Current Developments - Higher-order Ambisonics - Furse-Malham Higher-order Format

Furse-Malham higher-order format (FMH-Format) is a set of coefficients that can be applied to the first 16 B-format channels. The FMH set of coefficients applies weightings to the channels such that all the spherical harmonic coefficients have a maximum value of unity. Whilst this approach is not rigorously "correct" in mathematical terms, it has significant engineering advantages in that it restricts the maximum levels a panned mono source will generate in some of the higher-order channels.

The Furse-Malham set of weighting factors is part of the ".amb" specification for downloadable B-Format files.