Eliminating brake squeal generated during brake application is an important subject for the improvement of comfort in a car. There has been a lot of research into the problem of brake squeal in the past. Most of the papers presented elaborate on low-frequency brake squeal. However, brake squeal often has high-frequency vibration. For this reason, we have researched high-frequency brake squeal (5-10 kHz), so as to study the method of eliminating brake squeal by modification of the brake disc.