You can do this through the GPS test app. Technically, it depends on how the signal is. It consists of electromagnetic waves and can react with the basic components of obstacles. Therefore, the longer the signal wave, the thicker the obstacle must be. However, the wave may also be too small and "break" between the molecules. In fact, wifi jammer usually interfere with everything from short-wave and long-wave radios or model makers and also negatively affect GPS signals
