Zhongxin. com165438+1October 26th According to Weibo, the official of the Administrative Service Center of Chengdu Municipal People's Government, at noon today, when the plane of Cheng Fei Company was flying normally over the northwest of Chengdu, it broke the sound barrier and issued a sonic boom. 2015438+065438+1at 0: 20 pm on October 27th, netizens in Chengdu, Pixian, Shuangliu and Wenjiang reported hearing several loud noises.
When an object approaches the speed of sound, there will be strong resistance, which will lead to strong oscillation and speed attenuation. This phenomenon is often called sound barrier. When breaking through the sound barrier, because the compression of air by the object itself cannot spread quickly, it gradually accumulates on the windward side of the object, and finally forms a shock wave surface, on which the sound energy is highly concentrated. When these energies reach people's ears, people will feel a short and extremely strong explosion, which is called sonic boom.