Early lateral energy is being measured with two close spaced microphones: omni-directional and
bidirectional (with figure of eight directional pattern). Interaural cross correlation coefficients are
measured with either a dummy head, or a real head, and with two small microphones placed at the
entrance to the ear canals.
To measure spatial parameters a sound system with two microphone input channels is required. For
measurement of IACC two small identical microphones must be used at the entrance of the ear
channel of a dummy or a real head. For measurement of lateral energy fraction, an omnidirectional
microphone should be connected to left channel and bidirectional microphone to right channel.
Microphones should be calibrated, at least average difference in sensitivity have to be known.
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