Patent ID: 8121305
Filing Date: 2012-02-21
Classification: A61B,H04R

Abstract:
1. A fetal sound system comprising: an audio input that is able to receive one or more analog audio input signals to be transmitted to the ears of an expectant mother's fetus; an analog to digital converter having an input coupled to the audio input, said analog to digital converter for converting each of the received one or more analog audio input signals to a digital audio signal; a digital signal processor, having an input coupled to an output of the digital to analog converter, the digital to analog converter able to sum together and spectrally shape each of the one or more digital audio signals to compensate for spectral attenuation that would otherwise occur if the one or more analog input signals were directly transmitted, as received, between the expectant mother's abdominal area and the ears of the fetus; a digital to analog converter, coupled to an output of the digital signal processor, the digital to analog converter for converting the summed and spectrally shaped one or more digital audio signals to a summed and spectrally shaped analog audio output signal; and a transducer, coupled to the digital to analog converter, the transducer for converting the spectrally shaped analog audio output signal to a summed and spectrally shaped acoustic signal and for transmitting the summed and spectrally shaped acoustic signal to the ears of the fetus when the transducer is coupled to the abdominal area of the expectant mother.