Detection of audible alerts

1. A medical device comprising:

a microphone configured to generate an audio signal indicative of audio captured by the microphone;

one or more processors; and

one or more processor-readable storage media storing instructions which, when executed by the one or more processors, cause performance of:

determining an occurrence of an alert condition;

transmitting, to a separate device and via a short-range wireless communication channel, data indicative of the occurrence of the alert condition, wherein the separate device is physically separate from the medical device;

after transmitting the data indicative of the occurrence of the alert condition to the separate device, determining, based on the audio signal generated by the microphone, whether the separate device has outputted an audible alert indicative of the alert condition; and

responsive to determining that the separate device has not outputted the audible alert, causing performance of one or more remedial actions until the microphone generates a different audio signal indicative of the separate device outputting the audible alert indicative of the alert condition.

2. The medical device of claim 1 , wherein determining, based on the audio signal generated by the microphone, whether the separate device has outputted the audible alert comprises:

determining, based at least in part on applying a Goertzel filter on the audio signal, that a frequency of a tone in the audio signal captured by the microphone matches an expected frequency.

3. The medical device of claim 2 , wherein determining, based at least in part on applying the Goertzel filter on the audio signal, that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency comprises:

determining the expected frequency associated with the alert condition from a plurality of expected frequencies associated with a plurality of alert conditions.

4. The medical device of claim 2 , wherein determining, based at least in part on applying the Goertzel filter on the audio signal, that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency comprises:

determining a level of severity associated with the alert condition; and

determining the expected frequency associated with the level of severity from a plurality of expected frequencies associated with a plurality of levels of severity.

5. The medical device of claim 2 , wherein determining, based on the audio signal generated by the microphone, whether the separate device has outputted the audible alert further comprises:

responsive to determining that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency, determining whether a signal strength of the tone exceeds a signal strength threshold; and

responsive to determining that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency and that the signal strength of the tone exceeds the signal strength threshold, determining that the separate device has outputted the audible alert.

6. The medical device of claim 1 , wherein the one or more remedial actions comprise outputting a backup alert, wherein outputting the backup alert comprises:

determining a level of severity associated with a second alert condition; and

outputting the backup alert based at least in part on the level of severity associated with the second alert condition.

7. The medical device of claim 1 , wherein the instructions which, when executed by the one or more processors, further cause performance of:

performing a test with the separate device, wherein performing the test comprises:

transmitting, to the separate device, a request to play a high-frequency test tone, and

after transmitting the request, determining that the separate device has outputted the high-frequency test tone.

8. The medical device of claim 1 , wherein transmitting, to the separate device, the data indicative of the occurrence of the alert condition comprises:

wirelessly transmitting, to the separate device, a request to output the audible alert.

9. A method comprising:

determining, by one or more processors of a medical device, an occurrence of an alert condition;

causing transmission, by the one or more processors and to a separate device via a short-range wireless communication channel, of data indicative of the occurrence of the alert condition, wherein the separate device is physically separate from the medical device;

after causing transmission of the data indicative of the occurrence of the alert condition to the separate device, determining, by the one or more processors and based on an audio signal generated by a microphone of the medical device, whether the separate device has outputted an audible alert indicative of the alert condition, wherein the audio signal corresponds to audio captured by the microphone; and

responsive to determining that the separate device has not outputted the audible alert, causing, by the one or more processors, performance of one or more remedial actions until the microphone generates a different audio signal indicative of the separate device outputting the audible alert indicative of the alert condition.

10. The method of claim 9 , wherein determining, based on the audio signal generated by the microphone, whether the separate device has outputted the audible alert comprises:

determining, by the one or more processors and based at least in part on applying a Goertzel filter on the audio signal, that a frequency of a tone in the audio signal captured by the microphone matches an expected frequency.

11. The method of claim 10 , wherein determining, based at least in part on applying the Goertzel filter on the audio signal, that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency comprises:

determining, by the one or more processors, the expected frequency associated with the alert condition from a plurality of expected frequencies associated with a plurality of alert conditions.

12. The method of claim 10 , wherein determining, based at least in part on applying the Goertzel filter on the audio signal, that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency comprises:

determining, by the one or more processors, a level of severity associated with the alert condition; and

determining, by the one or more processors, the expected frequency associated with the level of severity from a plurality of expected frequencies associated with a plurality of levels of severity.

13. The method of claim 10 , wherein determining, based on the audio signal generated by the microphone, whether the separate device has outputted the audible alert further comprises:

responsive to determining that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency, determining, by the one or more processors, whether a signal strength of the tone exceeds a signal strength threshold; and

responsive to determining that the frequency of the tone in the audio signal captured by the microphone matches the expected frequency and that the signal strength of the tone exceeds the signal strength threshold, determining, by the one or more processors, that the separate device has outputted the audible alert.

14. The method of claim 9 , further comprising outputting a backup alert, and wherein causing outputting of the backup alert comprises: determining a level of severity associated with a second alert condition; and causing output of the backup alert based at least in part on the level of severity associated with the second alert condition.

15. The method of claim 9 , further comprising:

performing, by the one or more processors, a test with the separate device, wherein performing the test comprises:

causing transmission, by the one or more processors and to the separate device, a request to play a high-frequency test tone, and

determining, by the one or more processors, that the separate device has outputted the high-frequency test tone.

16. The method of claim 9 , wherein causing transmission, to the separate device, of the data indicative of the occurrence of the alert condition comprises:

causing wireless transmission, by the one or more processors and to the separate device, of a request to output the audible alert.

17. One or more non-transitory processor-readable storage media storing instructions which, when executed by one or more processors of a medical device, cause performance of:

determining an occurrence of an alert condition;

transmitting, to a separate device via a short-range wireless communication channel, data indicative of the occurrence of the alert condition, wherein the separate device is physically separate from the medical device;

after transmitting the data indicative of the occurrence of the alert condition to the separate device, determining, based on an audio signal generated by a microphone, whether the separate device has outputted an audible alert indicative of the alert condition, wherein the audio signal corresponds to audio captured by the microphone; and

responsive to determining that the separate device has not outputted the audible alert, causing performance of one or more remedial actions until the microphone generates a different audio signal indicative of the separate device outputting the audible alert indicative of the alert condition.

18. The one or more non-transitory processor-readable storage media of claim 17 , wherein determining, based on the audio signal generated by the microphone, whether the separate device has outputted the audible alert comprises:

determining, based at least in part on applying a Goertzel filter on the audio signal, that a frequency of a tone in the audio signal captured by the microphone matches an expected frequency.