L’Oréal Japan has developed a device that can represent hair damage in sound, according to a report published by Nikkei.

The device, which the Japanese arm of the French beauty giant plans to commercialize next year, uses a sensor to measure friction as it scans the hair from root to tip. An algorithm then converts this in to music.

The beauty tool will be used in salons to gauge whether customers require a restorative conditioning treatment, and also to demonstrate whether the product has worked.