A channel simulation device comprising: at least one input device (31, 32, 33) through which a user input operation is received; a memory configured to store at least one distance calculation parameter for calculating distances between multiple wireless microphones and a receiver in multiple areas in which the multiple wireless microphones and the receiver are used, wherein the areas are set arbitrarily by the user, and at least one reception strength calculation parameter for estimating reception strengths when transmission signals transmitted from the wireless microphones are received by the receiver, wherein the distance calculation parameter is used to calculate, in a space including multiple areas in which the multiple wireless microphones and the receiver are used, the distances between the wireless microphones and the receiver within each area or between the areas, wherein the distance calculation parameter is a coordinate parameter indicating the arrangement of the wireless microphones in a coordinate space and a coordinate parameter indicating the arrangement of the receiver in a predetermined coordination space, and wherein the distance calculation parameter is derived based on a user's operation of specifying the range or the arrangement of the multiple areas through the input device (31, 32, 33); and a processor configured to estimate, for each set of two areas selected from the multiple areas, a desired-wave reception strength when a transmission signal transmitted from a wireless microphone in one area of the two areas is received by the receiver in the one area and an interference-wave reception strength when a transmission signal transmitted from a wireless microphone in the other area of the two areas is received by the receiver in the one area, based on the distance calculation parameter and the reception strength calculation parameter, wherein the estimated desired-wave reception strength and interference-wave reception strength are used to generate a channel plan for the wireless microphones. at least one input device (31, 32, 33) through which a user input operation is received; a memory configured to store at least one distance calculation parameter for calculating distances between multiple wireless microphones and a receiver in multiple areas in which the multiple wireless microphones and the receiver are used, wherein the areas are set arbitrarily by the user, and at least one reception strength calculation parameter for estimating reception strengths when transmission signals transmitted from the wireless microphones are received by the receiver, wherein the distance calculation parameter is used to calculate, in a space including multiple areas in which the multiple wireless microphones and the receiver are used, the distances between the wireless microphones and the receiver within each area or between the areas, wherein the distance calculation parameter is a coordinate parameter indicating the arrangement of the wireless microphones in a coordinate space and a coordinate parameter indicating the arrangement of the receiver in a predetermined coordination space, and wherein the distance calculation parameter is derived based on a user's operation of specifying the range or the arrangement of the multiple areas through the input device (31, 32, 33); and a processor configured to estimate, for each set of two areas selected from the multiple areas, a desired-wave reception strength when a transmission signal transmitted from a wireless microphone in one area of the two areas is received by the receiver in the one area and an interference-wave reception strength when a transmission signal transmitted from a wireless microphone in the other area of the two areas is received by the receiver in the one area, based on the distance calculation parameter and the reception strength calculation parameter, wherein the estimated desired-wave reception strength and interference-wave reception strength are used to generate a channel plan for the wireless microphones.