In this talk, a quick review on the recent and current research works conducted within the Acoustics Lab in the Mechanical Eng. Dept. at KAIST will be delivered. Topics will be centered on the recent and present MS and PhD projects. It is noted that the past works are mostly related to the duct acoustics, vibro-acoustic source identification, modeling of sound propagation in gaseous and soild media, product sound quality, and design/development of quiet machines. In contrast, many recent works are concerned on the vibro-acoustic rendering, electro-acoustic sensors and actuators, and design and implementation of new vibro-acoustic elements and systems. As the major methodology, the vibro-acoustic inverse problem is employed very usefully for various tasks.