DEVICE FOR ACOUSTICALLY REPRODUCING THE RESPIRATORY FUNCTION FOR A RESPIRATOR
First Claim
1. A device for acoustically reproducing the respiratory function for a respirator, with a patient respiration circuit, the device comprising:
- a noise generator;
a volume flow sensor device, which determines the volume flow in the patient respiration circuit and generates an electric signal representing the volume flow;
a volume flow evaluating unit, which is set up to pick up the volume flow signal and to generate, as a function of the volume flow signal, a control signal for the noise generator in such a way that an acoustic signal with a loudness rising or falling with a rising or falling volume flow is generated;
a microphone; and
an evaluating unit connected to said microphone, said evaluating unit generating a measure for an instantaneous ambient noise level on the basis of a microphone signal by averaging over at least one period of time and to increase or reduce the loudness of the acoustic signal with rising or falling ambient noise level as a preset monotonic function of said measure.
3 Assignments
0 Petitions
Accused Products
Abstract
A device is provided for acoustically reproducing the respiratory function for a respirator, with a patient respiration circuit. The device has a noise generator, a volume flow sensor device, which determines the volume flow in the patient respiration circuit and generates an electric signal representing the volume flow, and a volume flow evaluating unit, which is set up to pick up the volume flow signal and to generate a control signal for the noise generator as a function of this in such a way that an acoustic signal with a loudness rising (falling) with rising (falling) volume flow is generated. To optimize the loudness of the acoustic signal, a microphone and an evaluating unit connected thereto are provided, which said evaluating unit is set up to generate at least a first measure for the instantaneous ambient noise level on the basis of the microphone signal by averaging over at least one period of time and to increase (reduce) the loudness of the acoustic signal with rising (falling) ambient noise level as a preset monotonic function of the at least one measure.
-
Citations
23 Claims
-
1. A device for acoustically reproducing the respiratory function for a respirator, with a patient respiration circuit, the device comprising:
-
a noise generator; a volume flow sensor device, which determines the volume flow in the patient respiration circuit and generates an electric signal representing the volume flow; a volume flow evaluating unit, which is set up to pick up the volume flow signal and to generate, as a function of the volume flow signal, a control signal for the noise generator in such a way that an acoustic signal with a loudness rising or falling with a rising or falling volume flow is generated; a microphone; and an evaluating unit connected to said microphone, said evaluating unit generating a measure for an instantaneous ambient noise level on the basis of a microphone signal by averaging over at least one period of time and to increase or reduce the loudness of the acoustic signal with rising or falling ambient noise level as a preset monotonic function of said measure. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
-
-
18. A combination respirator with device for acoustically reproducing the respiratory function, the combination comprising:
-
a patient respiration circuit; a volume flow sensor determining a volume flow in said patient respiration circuit and generating an electric signal representing the volume flow; a noise generator; a volume flow evaluating unit for receiving said volume flow signal and generating, as a function of said volume flow signal, a control signal for the noise generator; a microphone; and an evaluating unit connected to said microphone, said evaluating unit generating an instantaneous ambient noise level value on the basis of a microphone signal by averaging over at east one period of time and increasing or decreasing a loudness of the output of said noise generator. - View Dependent Claims (19, 20)
-
-
21. A device for acoustically reproducing the respiratory function for a respirator, with a patient respiration circuit, the device comprising:
-
a noise generator; a volume flow sensor device, which determines the volume flow in the patient respiration circuit and generates an electric signal representing the volume flow; a volume flow evaluating unit, which is set up to pick up the volume flow signal and to generate, as a function of the volume flow signal, a control signal for the noise generator in such a way that an acoustic signal with a loudness rising or falling with a rising or falling volume flow is generated; a microphone; an evaluating unit connected to said microphone, said evaluating unit generating a measure for an instantaneous ambient noise level on the basis of a microphone signal by averaging over at least one period of time and to increase or reduce the loudness of the acoustic signal with rising or falling ambient noise level as a preset monotonic function of said measure; and a mixing stage for mixing ambient noise from said microphone with said acoustic signal to form a mixed signal. - View Dependent Claims (22, 23)
-
Specification