§Directional transducers, the first attempts of spatial analysis
§Orthonormal decomposition of the spatial properties in spherical
harmonics: the Ambisonics method
§The reciprocity principle: directive microphones and directive
sources
§Generalization of higher-order spherical harmonics representation
of both source and receiver directivity
§Joining time and space: from Einstein’s view to a comprehensive
data structure representing the acoustical transfer
function of a room
§Practical usages of measured (or numerically simulated) temporal-spatial
impulse responses