The ground trembled. It is generally used in KTV and discotheques, and its main function is to enhance the dynamic effect.

The most common one is the disco floor tremor stage, which is a non-powered stage designed based on the principle that springs can store energy. It uses the weight of people to deform the springs and store energy. When the spring deforms to its extreme position, the stored energy is released. At the same time, the frequency of sound is used to generate vibrations to deform the spring, which is commonly known as spring floor, spring stage, spring dance floor, trampoline, ground shaking, etc. This question has actually been asked before, although the content It's a copy, but I hope it helps.