Vibration or acoustic tests that are recognized as a fundamental technique in machinery dynamics fields are used to design machines or structures with desired dynamic performance such as a natural frequency or vibration mode shape. In general, we use a hammer, a shaker, a speaker, etc. to input and an accelerometer, a microphone, etc. to measure responses, respectively. It might be hard to demonstrate the tests using conventional excitation devices, if the target structures are very small, soft, fragile, etc. We have realized a new excitation method based on a laser plasma, including laser ablation (LA) or laser shockwave (LS) to solve these limitations. Furthermore, we have established a speaker for acoustic tests made of dielectric elastomer actuators whose characteristics are soft, flexible, light weight, etc., realizing a balloon speaker.