There are a few ways to listen to soundwave tattoos. The most common way is to use a smartphone app that is specifically designed to read soundwave tattoos. There are a few different apps available, but the most popular ones are Soundwave Tattoo Reader and Soundwave Tattoo Scanner.
Another way to listen to soundwave tattoos is to use a regular scanner or photocopier. Simply place the tattoo on the scanner bed and scan it. The soundwave will be converted into an audio file that can be played back on any computer or mobile device.
Finally, there are a few companies that offer special soundwave tattoo reader devices. These devices look similar to regular scanners, but they have a built-in speaker that allows you to listen to the soundwave tattoo without having to connect it to a computer or mobile device.