The invention discloses an external-hanging
sound barrier for
rail transit. The
sound barrier comprises a plurality of vertical
steel columns located on one side of a rail. Every two adjacent vertical
steel columns are fixedly connected through a support crossbeam. A guardrail board is disposed on one side, away from the rail, of each vertical steel column, and a sound absorbing and shielding body is located above the guardrail board. Each vertical steel column is provided with a through hole allowing a steel
wire rope to penetrate. The
sound barrier further comprises a
noise sensor which is disposed on one side, away from the rail, of each sound absorbing and shielding body, and the
noise sensor is connected with a
control circuit which is connected with a storage battery. The sound barrier has the advantages that the sound barrier is durable in structure, stable in performance, convenient to
mount, and good in appearance streamline, main body construction of the
rail transit is unaffected, various cables are prevented from being exposed under
sunlight,
noise on the outer side of the sound barrier can be monitored in real time, and the
noise reduction and sound shielding amount of the sound barrier is 10-15dB(A).