A new poster made a debut in three railway stations in Tokyo. Is it digital signage? No, it is sound signage. This poster was developed by Yamaha in alliance with Asahi Drinks. Using an ultrathin speaker about 1.5 mm thick, the company developed the technology to let people hear a CM song and started the substantiative experiments. The ultrathin speaker named TLF speaker that has a vibrating membrane between two electrodes releases sound audible only to people before the poster, and the speaker is covered by cloth to create a poster. People can hear and listen to the CM song while they are before the poster. Yamaha built seven posters in Shinjuku Station that is one of the busiest stations in Tokyo, the largest one of which measures 190 cm high and 720 cm wide. Pedestrians in Shinjuku Stations stopped before the poster to enjoy Asahi Drinks’ CM song. Yamaha plans to put the technology into practical use within the year and market the poster as a new advertising medium called the sound signage nationwide. It also plans to market the new product for exhibitions and sales promotion at the shopfront.