Patent ID: 7804964
Filing Date: 2010-09-28
Classification: G10K

Abstract:
1. A device for protecting the hearing from loud magnetic resonance tomograph sounds, comprising: a protective sound generating device coupled to magnetic resonance tomograph electronics of an magnetic resonance tomograph for creating a protective sound, the sound generating device configured to generate the protective sound having a slowly increasing amplitude, the protective sound configured to increase an impedance in the middle ear based on a Middle Ear Reflex (MER) of a patient undergoing examination using the magnetic resonance tomograph, wherein the sound generating device is further configured to generate the protective sound immediately before the loud magnetic resonance tomograph sounds set in when operating the magnetic resonance tomography, wherein the loud magnetic resonance tomograph sounds include an abruptly occurring loud gradient noise formed as a pulse sequence, and the protective sound generating device is further configured to: determine the set in of the loud gradient noise using a known sequence of control signals of the pulse sequence; and generate the protective sound having a time offset and based on an expected gradient sound level.