SOUND ABSORBER, SHEET FEEDER INCORPORATING THE SOUND ABSORBER, IMAGE READING DEVICE INCORPORATING THE SHEET FEEDER, IMAGE FORMING APPARATUS INCORPORATING THE SOUND ABSORBER, AND ELECTRONIC DEVICE INCORPORATING THE SOUND ABSORBER

摘要

A sound absorber, which is included in a sheet feeder included in an image reading device, an image forming apparatus, and an electronic device, includes a cavity, a communication portion through which the cavity communicates with an outside of a sheet feeder, and a communication direction changing device configured to change a communication direction of the communicating portion.