Work machine

A dust collector comprising:

• a drive machine for dust collection including a motor and a fan connected to a rotation shaft of the motor;
• a housing that houses the drive machine, the housing having an exhaust port;
• an exhaust path for guiding an airflow generated from the fan by motion of the drive machine to the exhaust port located downstream, the exhaust path extending from the exhaust port toward the drive machine into the housing;
• a microphone configured to collect sound in the housing, including operating noise generated in the housing by the motion of the machine, and output a sound signal that is an electrical signal corresponding to the sound;
• a windshield that surrounds the microphone;
• and
• a structure provided along the exhaust path, the structure defining a receiving space for the microphone,
• the microphone being arranged in the receiving space in the housing in a state surrounded by the windshield,
• the structure including:
• a partition wall extending from a sidewall of the exhaust path toward the downstream in the exhaust path, the partition wall extending over the entire height of the exhaust path from bottom to ceiling of the exhaust path;
• and
• an open structure that connects the receiving space to the exhaust path between a downstream end of the partition wall and the side wall, and
• the structure defining the receiving space between the side wall and the partition wall in the downstream of a connecting point between the side wall and the partition wall in the exhaust path and in upstream of the open structure.