What role does frequency play in the effectiveness of Sonic devices?

The effectiveness of Sonic devices is heavily influenced by frequency because it relates directly to the depth of tissue that the sonic waves can penetrate. Different tissues in the body absorb and react to sound waves at varying frequencies, which means that higher frequencies might be used for shallower penetration in superficial tissues, while lower frequencies allow for deeper tissue penetration. This understanding is critical as it enables practitioners to select the appropriate frequency based on the treatment objectives and the specific conditions of the patient's tissues.

Other options do not accurately reflect the role of frequency in this context. The size of the device is not directly influenced by frequency; rather, device size can be a function of design and intended use. Patient eligibility is determined by various factors including medical history and current health status, rather than frequency alone. Lastly, frequency has no bearing on the color of the display of the device, which is typically designed for visibility and user interaction rather than being influenced by the sonic frequency settings.