35. The device of claim 32 , wherein the sound recognition unit is further configured to: group the one or more sound models into one or more sets of sound models based on the one or more labels; for each set of the one or more sets of sound models, calculate a sum of the similarity values of sound models the set to determine a largest sum; and select a particular label associated with a set of the one or more sets having the largest sum.
35. The device of claim 32 , wherein the sound recognition unit is further configured to: group the one or more sound models into one or more sets of sound models based on the one or more labels; for each set of the one or more sets of sound models, calculate a sum of the similarity values of sound models the set to determine a largest sum; and select a particular label associated with a set of the one or more sets having the largest sum. 36. The device of claim 35 , wherein the confidence level is determined based on a difference between the largest sum and a second largest sum of the sums determined for the one or more sets of sound models.