It is not reliable at present. Sound waves are divided into infrasound waves, sound waves and ultrasonic waves. Sound waves transmit energy in the form of energy waves, and after reaching the receiver, they match the receiving frequency band of the receiver. This is why sounds are distinguished. Scientifically speaking, the current acoustic wave technology can only make the target object vibrate. As for whether cancer can be treated by vibration in the medical field. This remains to be discussed. Just like a molybdenum pendant, whether it can really cure diseases when worn around the neck needs to be confirmed. At least the current level of science and technology cannot prove its effectiveness. It does not deny that it is effective. It just didn't reach the verifiable technical level.