Abstract: An instrument for performing an audio test on a loudspeaker of a motor vehicle is disclosed. The instrument comprises a support device having attachment means configured to be coupled to first and second hinge attachments in the passenger compartment of the motor vehicle so that the support device is supported within the passenger compartment, one or more microphones carried by the support device at respective fixed positions and configured to pick up sounds emitted by the loudspeaker and generate related signals, and a signal processing unit carried by the support device and configured to at least transmit, externally to the instrument, data associated with the signals generated by the microphones.

Abstract: A wearable helmet capable of recording a 3D sound, a 3D sound system using the same, and a method therefor. An exemplary embodiment of the present disclosure provides a wearable helmet capable of 3D sound recording, including: one or more microphones configured to collect surrounding sound sources; and an analog-to-digital converter configured to convert the sound sources collected through the at least one microphone into digital signals and to provide the digital signals to an external signal conversion device.

Abstract: An axle for a motor vehicle includes an electric motor having an outer casing, an electrical grid configured to power the motor and comprising an inverter in turn comprising a box internally defining a housing and attached to the outer casing, an electronic board comprising a transducer configured to detect a quantity indicative of a vibration of the axle and to generate a corresponding signal, characterized in that the electronic board is attached to the box.

Abstract: An axle for a motor vehicle includes an electric motor having an outer casing, an electrical grid configured to power the motor and comprising an inverter in turn comprising a box internally defining a housing and attached to the outer casing, an electronic board comprising a transducer configured to detect a quantity indicative of a vibration of the axle and to generate a corresponding signal, characterized in that the electronic board is attached to the box.

Abstract: A wearable helmet capable of recording a 3D sound, a 3D sound system using the same, and a method therefor. An exemplary embodiment of the present disclosure provides a wearable helmet capable of 3D sound recording, including: one or more microphones configured to collect surrounding sound sources; and an analog-to-digital converter configured to convert the sound sources collected through the at least one microphone into digital signals and to provide the digital signals to an external signal conversion device.