| 摘要 |
The invention relates to a noise reduction device for a dental instrument (1) for the dental treatment of a patient, having - at least one sound sensor (3) arranged on the dental instrument (1), - at least one sound generator (4) arranged on the dental instrument (1), - at least one electronic control module which is connected to the sound sensor (3) and the sound generator (4) in order to analyse the sound signals picked up by the sound sensor (3), to calculate signals for active noise compensation and to pass them to the sound generator (4). The problem addressed by the invention is that of configuring a noise reduction device and method for a dental instrument in as efficient and simple a manner as possible. This problem is solved by the following features: - the sound sensor (3) is arranged on a region of the dental instrument (1) which is located in the oral cavity or close to the mouth opening of the patient while the patient is being treated with the dental instrument (1); - the sound generator (4) is arranged on a region of the dental instrument (1) which is located in the oral cavity or close to the mouth opening of the patient while the patient is being treated with the dental instrument (1); - the distance between the sound sensor (3) and the sound generator(4) has a fixed and known value which is stored in the control module for calculating the signals for active noise compensation. |
