There are many different devices that handle sound in our surroundings such as audio visual devices for enjoying music, smartphones and PCs, and various consumer electronics that inform us about their operations using sound. Additionally, smart speakers and other products that can be operated by voice have also started to appear. TDK has long been closely involved in sound starting with audio cassette tapes. TDK has an extensive lineup of products in the electronic device field for sound applications including piezo speakers, MEMS microphones, piezoelectric and electromagnetic buzzers, suppression filters that control noise, and varistors. TDK provides solutions for new technologies.