Attempt to measure sound transmission loss using two cardioid microphones

The C-C method uses cardioid microphones to measure sound pressure, particle velocity, and sound intensity. We attempt to apply the C-C method to measuring the sound transmission loss of a building component. We obtain results in the one-third octave bands above 315 Hz that are comparable to those obtained by the sound pressure level difference method commonly used. The results reveal that the measurement method using the C-C method validated in this study can be an alternative to other sound transmission loss measurement methods.