| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic tube for measuring transmission loss closer to an actual value in a low sound frequency band. SOLUTION: This acoustic tube 1 is provided with a tube body 2 whose one edge 2a is closed, and whose other edge is provided with a speaker 3, and a sample 4 is arranged in the tube body 2 so that the acoustic transmission loss of the sample 4 can be measured. In this case, a sound absorbing material 12 is set between the edge 2a and the sample 4 inside the tube body 2, and the sound absorbing material 12 is shaped like a sound absorbing wedge. |
