1. A method for ambient background noise modification, the method comprising: identifying, using a hardware processor, at least one noise present in a household of a user having a user device, an activity the user is currently engaged in, and a physical or emotional state of the user; determining, using the hardware processor, a target activity for the user based on the activity the user is currently engaged in and the physical or emotional state of the user; determining, using the hardware processor, a target ambient noise to be produced in the household based at least in part on the identified noise, the activity the user is currently engaged in, the physical or emotional state of the user, and the target activity for the user; identifying, using the hardware processor, at least one device located in the household of the user associated with the user device to be used to produce the target ambient noise, wherein at least one of the identified devices has a fan; determining, using the hardware processor, sound outputs corresponding to each of the identified devices, wherein a combination of the sound outputs produces an approximation of one or more characteristics of the target ambient noise; causing, using the hardware processor, at a first time point, the identified devices to produce the determined sound outputs by modulating a speed of the fan associated with the at least one of the identified devices based on the physical or emotional state of the user; determining, using the hardware processor, at a second time point, whether the user is performing the target activity; and in response to determining that the user is not performing the target activity, causing, using the hardware processor, the identified devices to continue producing the determined sound outputs by continuing to modulate the speed of the fan associated with the at least one of the identified devices until the user begins performing the target activity.