SOUND OUTPUT DEVICE

摘要

PROBLEM TO BE SOLVED: To effectively mask noise having directivity.SOLUTION: A sound output device 1 includes: sound reproduction means 13 for masking operation sound to be generated by an image forming apparatus 2, etc. to reproduce masking sound with different sound pressure level according to directions based on the image forming apparatus 2; and sound output means 14 for emitting the masking sound reproduced by the sound reproduction means 13.