80. The non-transitory computer-readable medium of claim 77 , wherein the operations further comprise, if the confidence level of the second label is less than the second confidence threshold: providing the client device with an indication of a failure in recognizing the input environmental sound; identifying a set of the one or more sound models with information corresponding to at least one of a first location and a first time that match the at least one of the location information and the time information; identifying a first sound model having a greatest similarity to the input sound model from the set; and if the similarity between the input sound model and the first sound model is greater than or equal to a similarity threshold, merging the input sound model and the first sound model in the server database.
77. The non-transitory computer-readable medium of claim 74 , wherein the operations further comprise: receiving at least one of location information and time information associated with the input sound model from the client device, wherein the server database comprises information corresponding to at least one of a location and a time associated with each of the plurality of sound models.