What limitation does the EGG method face regarding signal accuracy?

The EGG (electroglottography) method is used to measure laryngeal activity and provides insights into vocal fold function. However, one significant limitation of this method is that skin and fat layers can obscure the electrical signals being measured. The EGG relies on the contact between electrodes placed on the skin of the neck, which detect changes in electrical impedance as the vocal folds vibrate. If there are thick layers of skin or fat, they can interfere with the accuracy of signal capture, leading to distorted or attenuated readings.

This limitation is important to consider, especially when assessing vocal function across different individuals, as variations in body composition can significantly impact the clarity and reliability of the data obtained from the EGG method. The other options do not address the core issue of external interference affecting the signal integrity, which is pivotal in understanding the effectiveness and constraints of the EGG technique in clinical practice.