Acoustic device

An acoustic device comprising:

• a rotary operator;
• and
• a base supporting the rotary operator so that the rotary operator is rotatable,
• the base comprising:
• a braking unit configured to be brought into contact with the rotary operator to cause a braking force to act on the rotary operator;
• and
• an adjuster configured to adjust the braking force caused by the braking unit,
• the braking unit comprising:
• a plurality of contact members configured to be brought into contact with the rotary operator to cause the braking force to act on the rotary operator;
• and
• a movable body provided with the plurality of contact members and configured to move in directions toward and away from the rotary operator,
• wherein
• the adjuster moves the movable body in the directions toward and away from the rotary operator, and
• the plurality of contact members are each independently biased toward the rotary operator, and the braking force acting on the rotary operator by the plurality of contact members varies depending on an adjustment amount by the adjuster.