NEGATIVE ION GENERATING MECHANISM IN SOUND FIELD SPACE

摘要

PROBLEM TO BE SOLVED: To provide a negative ion generating mechanism which improves the propagation of acoustic waves in a sound field space by changing the characteristics of the atmosphere in the sound field space. SOLUTION: The sound field space is provided with a negative ion generator connected to a signal transmission section or signal reception signal for acoustic signals and negative ions are generated from a negative pole member of the negative ion generator in accordance with the acoustic signals in the signal transmission section or signal reception signal for the acoustic signals.