Breathing biofeedback device
A breathing biofeedback device, having a microphone configured to acquire sounds of a user's breathing; a controller communicatively connected with the microphone, the controller processing the signals acquired by the microphone to produce an output signal, the controller processing the signal whereby the microphone signal is first pre-amplified to a voltage level that can be processed by an audio envelope detector circuit, the envelope detector signal is then fed into the analog-to-digital converter input of the controller allowing it to constantly sample the input volume level, the controller then controlling the output volume level fed to the headphones utilizing a digitally controlled variable-gain amplifier, wherein the output signal is not modified in any manner from the original input, except in volume; and a pair of earphones connected with the controller and configured to convey the output signal to the user.
1. A breathing biofeedback device, comprising: a microphone configured to convert breathing related sound signals into a first output signal;
a preamplifier amplifying the first output signal to generate a second output signal;
a variable gain amplifier operable to amplify the second output signal in accordance with a gain level signal to generate a third output signal;
a controller comprising an audio envelope detector operable to receive the second output signal from the preamplifier, wherein the controller is operable to generate the gain level signal in response to an analysis of an output of the audio envelope detector and wherein the gain level signal increases in response to an increase in a volume level of the second output signal and decreases in response to a decrease in the volume level of the second output signal;
and earphones operable to convert the third output signal into breathing sound signals output to a user, wherein the controller further comprises a state machine configured to detect a type of breath cycle and further wherein the controller is configured to operate in one of several functional modes based on the type of breath cycle detected, wherein the functional mode is selected from a group consisting of: a basic mode for enabling a user to set one of an output volume and effects preset to the breathing sound signals output to the user, an anti-snore mode operable to detect breath cycles associated with snoring, a stress reduction mode operable to add additional sounds to the breathing sound signals output to the user, and a fitness training mode operable to add a sound of a pulse to the breathing sound signals output to the user.
2. The device of claim 1 further comprising a user interface operatively coupled with the controller.
3. The device of claim 1 wherein in said anti-snore mode the controller is further configured to detect the wave frequency and volume of a snore, and further wherein the gain level increases as the detected volume increases and the gain level decreases as the detected volume decreases.
4. The device of claim 1 wherein in said stress reduction mode the controller is configured to add background sounds operable to enhance relaxed breathing patterns to the breathing sound signals output to the user.
5. The device of claim 1 wherein in said fitness training mode the controller is configured to add the sound of a pulse along with the user's breath, wherein the pulse is operable to provide a cue for the user to breathe at a certain rate.
6. A method for determining breathing biofeedback comprising:
converting breathing related sound signals into a first output signal;
amplifying the first output signal using a preamplifier to generate a second output signal;
generating a third output signal by amplifying the second output signal in accordance with a gain level signal using a variable gain amplifier;
using a digital signal processor (DSP) comprising an audio envelope detector operable to receive the second output signal from the preamplifier to generate the gain level signal in response to an analysis of an output of the audio envelope detector, wherein the gain level signal increases in response to an increase in volume level of the second output signal and decreases in response to a decrease in volume level of the second output signal;
and converting the third output signal to breathing sound signals for output to a user, wherein the digital signal processor further comprises a state machine configured to detect a type of breath cycle and further wherein the digital signal processor is configured to operate in one of several functional modes based on the type of breath cycle detected, wherein the functional mode is selected from a group consisting of: a basic mode for enabling a user to set one of an output volume and effects preset to the breathing sound signals output to the user, an anti-snore mode operable to detect breath cycles associated with snoring, a stress reduction mode operable to add additional sounds to the breathing sound signals output to the user, and a fitness training mode operable to add a sound of a pulse to the breathing sound signals output to the user.
7. The method of claim 6 further comprising using a user interface operatively coupled with the controller to receive input and provide operational information to the user.
8. The device of claim 6 wherein in said anti-snore mode the digital signal processor is further configured to detect the wave frequency and volume of a snore, and further wherein the gain level increases as the detected volume increases and the gain level decreases as the detected volume decreases.