ELECTRIC MOTOR, VENTILATOR, AND SYSTEM CONSISTING OF AN ELECTRIC MOTOR AND ANALYSIS UNIT

An electric motor includes at least one bearing and a rotatably-mounted axle. During operation, generated sound can be detected by a sound sensor. A sound chamber is formed in the electric motor, and is delimited by several boundary surfaces. At least one of the boundary surfaces may include an acoustic surface that is formed by a surface of the bearing or by a surface of a body conducting sound. The sound sensor is arranged in the sound chamber to detect sound transmitted from the acoustic surface to the sound sensor. The motor may be part of a fan and/or a system having an evaluation unit. In the former case, an impeller is provided, which is connected to a rotor of the electric motor. In the second case, the evaluation unit has a communication interface via which readings of a sound sensor and/or processed readings from sensor electronics may be received.