Detecting objects within a vehicle

1. A method comprising:

emitting, by an object detection system of a vehicle, at least one first auditory signal within the vehicle during at least one first time interval;

measuring, by the object detection system, a second auditory signal emitted by an object within the vehicle during a second time interval subsequent to the at least one first time interval, wherein the emission of the second auditory signal is caused by the emission of the at least one first auditory signal;

determining, by the object detection system, a location of the object within the vehicle based on the measurement of the second auditory signal; and

generating, by the object detection system, an alert to a user indicating the location of the object.

2. The method of claim 1 , wherein generating the alert comprises:

emitting a third auditory signal at an exterior of the vehicle.

3. The method of claim 1 , wherein generating the alert comprises:

transmitting an electronic message to a mobile device associated with the user.

4. The method of claim 1 , further comprising:

determining that the user has exited the vehicle, and

wherein the at least one first auditory signal is emitted subsequent to determining that the user has exited the vehicle.

5. The method of claim 1 , wherein a plurality of first auditory signals are emitted within the vehicle during a plurality of first time intervals.

6. The method of claim 1 , wherein the at least one first auditory signal comprises a sinusoidal signal.

7. The method of claim 1 , wherein the at least one first auditory signal comprises a sinusoidal sweep.

8. The method of claim 1 , wherein the at least one first auditory signal comprises an impulse response signal.

9. The method of claim 1 , further comprising:

determining a type of the object based on the measurement of the second auditory signal.

10. The method of claim 9 , wherein at least one of the location of the object or the type of the object is determined based on a neural network having the measurement of the second signal as an input.

11. The method of claim 1 , wherein the second auditory signal corresponds to a resonance of the object in response to the at least one first auditory signal.

12. The method of claim 1 , further comprising:

obtaining, by the object detection system, image data regarding an interior of the vehicle from one or more image sensors, and

wherein the location of the object is determined further based on the image data.

13. The method of claim 1 , wherein emitting the at least one first auditory signal comprises:

concurrently emitting the at least one first auditory signal using a plurality of speaker within the vehicle.

14. The method of claim 1 , wherein measuring the second auditory signal comprises:

concurrently measuring the second auditory signal using a plurality of microphones within the vehicle.

15. The method of claim 14 , wherein determining the location of the object comprises:

triangulating a location of the object based on the measurements of the second auditory signal by the plurality of microphones.

16. A system, comprising:

at least one processor; and

at least one non-transitory storage media storing instructions that, when executed by the at least one processor, cause the at least one processor to:

emit at least one first auditory signal within a vehicle during at least one first time interval;

measure a second auditory signal emitted by an object within the vehicle during a second time interval subsequent to the at least one first time interval, wherein the emission of the second auditory signal is caused by the emission of the at least one first auditory signal;

determine a location of the object within the vehicle based on the measurement of the second auditory signal; and

generate an alert to a user indicating the location of the object.

17. At least one non-transitory storage media storing instructions that, when executed by at least one processor, cause the at least one processor to:

emit at least one first auditory signal within a vehicle during at least one first time interval;

measure a second auditory signal emitted by an object within the vehicle during a second time interval subsequent to the at least one first time interval, wherein the emission of the second auditory signal is caused by the emission of the at least one first auditory signal;

determine a location of the object within the vehicle based on the measurement of the second auditory signal; and

generate an alert to a user indicating the location of the object.

18. The method of claim 1 , wherein the object is within an interior cabin of the vehicle.