  Experiments studying mainly proximity effect are presented. Pink noise and
music were used as stimuli and a combo guitar amplifier as source to test
several microphones: omnidirectional and directional. We plot in-axis levels
and spectral balances as functions of x, the distance to the source. Proximity
effect was found for omnidirectional microphones. In-axis level curves show
that 1/x law seems poorly valid. Spectral balance evolutions depend on
microphones and moreover on stimuli: bigger decreases of low frequencies with
pink noise; larger increases of other frequencies with music. For a naked
loudspeaker, we found similar in-axis level curves under and above the cut-off
frequency and propose an explanation. Listening equalized music recordings will
help to demonstrate proximity effect for tested microphones.Paper 7106
presented at the 122th Convention of the Audio Engineering Society, Wien, 2007
