Patent ID: 9026437
Filing Date: 2015-05-05
Classification: G10L,H04M

Abstract:
1. A location determination system comprising: a first mobile terminal including: a second mobile terminal including: the first processor acquires and analyzes the first sound signal periodically at given time intervals to acquire a first feature quantity, the first processor transmits the first feature quantity as the first analysis result, the second processor acquires and analyzes the second sound signal periodically at the given time intervals to acquire a second feature quantity as the second analysis result, the second processor compares the second feature quantity with the first feature quantity received from the first mobile terminal, the second sound signal corresponding to the compared second feature quantity and the first sound signal corresponding to the compared first feature quantity are acquired at the same time, the second processor counts a first number of the comparisons within a predetermined time period, the second processor counts a second number of times when a degree of matching between the second feature quantity and the first feature quantity exceeds a first threshold within the predetermined time period, the second processor calculates a ratio of the second number to the first number, and the second processor determines whether the ratio exceeds a second threshold to determine whether the first mobile terminal is located in the area in which the second mobile terminal is located.