Method for measuring the transmission characteristics of a first transmission path between a first transmitter and a receiver, wherein - the first transmitter sends a first signal into the first transmission path and said first signal is detected by the receiver after it passes through at least a section of the first transmission path, - a second transmitter sends a second signal into a second transmission path that with respect to its characteristics is known, is predetermined or can be predetermined, - the second signal is received in the receiver after it passes through the second transmission path and is superimposed with the first signal, characterized in that - a transmission signal is at least intermittently distributed between the first transmitter and the second transmitter in a controlled manner; - a receiver signal received by the receiver comprises a first signal component to be assigned to the first transmitter and a second signal component to be assigned to the second transmitter, wherein the first signal component averaged over a predefined time period is exactly as large as the second signal component averaged over said time period, and - the deviation of the first signal component averaged over the predefined time period from the second signal component averaged over the predefined time period is - referred to the receiver signal received by the receiver - at least intermittently used as control signal for the distribution of the transmission signal between the first transmitter and the second transmitter, and - the transmitters (4, 5) emit an acoustic signal and the receiver receives the acoustic signal after it passes through the transmission path (6, 20). - the first transmitter sends a first signal into the first transmission path and said first signal is detected by the receiver after it passes through at least a section of the first transmission path, - a second transmitter sends a second signal into a second transmission path that with respect to its characteristics is known, is predetermined or can be predetermined, - the second signal is received in the receiver after it passes through the second transmission path and is superimposed with the first signal, - a transmission signal is at least intermittently distributed between the first transmitter and the second transmitter in a controlled manner; - a receiver signal received by the receiver comprises a first signal component to be assigned to the first transmitter and a second signal component to be assigned to the second transmitter, wherein the first signal component averaged over a predefined time period is exactly as large as the second signal component averaged over said time period, and - the deviation of the first signal component averaged over the predefined time period from the second signal component averaged over the predefined time period is - referred to the receiver signal received by the receiver - at least intermittently used as control signal for the distribution of the transmission signal between the first transmitter and the second transmitter, and - the transmitters (4, 5) emit an acoustic signal and the receiver receives the acoustic signal after it passes through the transmission path (6, 20).