Method and system for an ultra low power dosimeter
Certain embodiments of the invention may be found in an ultra low power dosimeter assembly. The ultra low power dosimeter assembly may include a low power voltage source and a table circuit. The table circuit may be adapted to convert an input voltage to a second voltage level. The second voltage level may correspond to noise dose. The ultra low power dosimeter assembly may also include a switch adapted to trigger a control circuit. The control circuit may provide progressive attenuation of an output signal as the second voltage level increases. In certain embodiments, the control circuit may also be adapted to send one or more warning signals to a user of the ultra low power dosimeter. The one or more warning signals may be sent when the control circuit determines the second voltage level has reached one or more pre-determined threshold voltage levels.
1. An ultra low power dosimeter assembly, comprising:
a low voltage-power source;
a table circuit adapted to convert an input voltage to a second voltage level, wherein the second voltage level corresponds to noise dose; and
a control circuit adapted to send at least one warning signal to a user of the ultra low power dosimeter, wherein the at least one warning signal is sent when the control circuit determines the second voltage level has reached at least one pre-determined threshold voltage level, wherein the at least one warning signal is used to activate at least one audible signal and the at least one audible signal is sent to the user through at least one earphone.
2. The assembly of claim 1 further comprising a signal detection circuit adapted to control a switch based on measurements of the second voltage level, wherein the switch activates the control circuit.
3. The assembly of claim 1 wherein the ultra low power dosimeter receives the input voltage from an audio source.
4. The assembly of claim 3 wherein the audio source is a portable audio device.
5. The assembly of claim 1 wherein the table circuit uses a logarithmic amplifier to convert the input voltage to the second voltage level.
6. The assembly of claim 1 wherein the low voltage power source is approximately a 1.4 Volt battery.
7. The assembly of claim 1 wherein the at least one warning signal is further used to activate at least one of:
at least one light emitter diode (LED), and
at least one message on a liquid crystal display (LCD).
8. The assembly of claim 1 wherein the at least one audible signal is at least one of:
at least one audible beep, and
at least one interruption of an audio source.
9. A method for monitoring noise dose using an ultra low power dosimeter, the method comprising:
receiving an input voltage from an audio source;
converting the input voltage into a second voltage level, wherein the second voltage level corresponds to noise dose;
monitoring the second voltage level to determine when the second voltage level reaches at least one pre-determined threshold voltage level; and
sending at least one warning signal once the second voltage level reaches the at least one pre-determined threshold voltage level, wherein the at least one warning signal is used to activate at least one audible signal and the at least one audible signal is sent to the user through at least one earphone.
10. The method of claim 9 wherein the ultra low power dosimeter is powered by approximately a 1.4 Volt battery.
11. The method of claim 9 wherein the audio source is a portable audio device.
12. The method of claim 9 wherein a logarithmic amplifier is used to convert the input voltage to the second voltage level.
13. The method of claim 9 wherein the at least one warning signal is further used to activate at least one of:
at least one light emitter diode (LED), and
at least one message on a liquid crystal display (LCD).
14. The method of claim 9 wherein the at least one audible signal is at least one of:
at least one audible beep, and
at least one interruption of an audio source.
15. The method of claim 9 wherein the at least one warning signal provides progressive attenuation of an output signal as the second voltage level increases.