The vibration modes, the vibration behavior, and acoustic noise of the stator and rotor are also compared. A 12/16 external-rotor SRM designed for a direct-drive E-bike application is used for the ...

Nervous children starting school can be calmed by sound insulation tiles, suggests a new study ... there are no standards or guidelines for the acoustic design of preschool and school classrooms.

Nervous children starting school can be calmed by sound insulation tiles, suggests a new study. The architecture of a room ...

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