To study the acoustic radiation characteristics of forced vibration of granular assemblies. the acoustic radiation model of a single particle and the acoustic radiation model of granular assemblies are established. Combined with experimental verification. the variation law of radiated sound power in the process of forced vibration of granular assemblies is studied. https://www.duospiritalis.com/limited-deal-Radio-Birdman-Rock-Roll-Soldiers-T-Shirt-super-grab/