Formula impedance appearance is held to hand

• Main Authors: SUN FUGUI, SUN XINBO
• Format: Patent
• Language: Chinese; English
• Published: 15.01.2019
• Subjects: MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES; MEASURING; PHYSICS; TESTING

The utility model relates to an aircraft wall sound impedance test, road surface sound impedance test and other sound impedance test technical field who has the acoustic absorption performance material, and disclose formula impedance appearance is held to hand, including a center section of thick bamboo, the left side of a center section of thick bamboo is provided with a power section of thick bamboo, the right side of a center section of thick bamboo is provided with a probe section of thick bamboo, the inner wall of a power section of thick bamboo and the equal fixedly connected with internal thread pipe of inner wall of a probe section of thick bamboo, the equal fixedly connected with external thread pipe in both ends of a center section of thick bamboo, two external thread pipe's outer wall all with internal thread pipe thread connection, the inside of a power section of thick bamboo is provided with the battery, the first solid fixed ring of inner wall fixedly connected with of apower section of thick b