First of all, we need to understand what is a recording jammer and what is a signal jammer?
The recording jammer is used to interfere with the recording of recording equipment such as mobile phones and voice recorders. By emitting random ultrasonic noise, the recorded sound is mixed with noise, making the conversation unclear.  signal jammer
Signal jammers are used to block mobile phone signals. They block mobile phone 2/3/4G signals and WiFi signals, so that the mobile phone cannot make calls or access the Internet.
Both are jammers, but their principles and uses are not the same.
Signal jammers can block mobile phone signals, WIFI signals, walkie-talkie signals, GPS signals, remote control signals, etc., which are all types of signals. This type of jammer interferes with normal signal reception through the frequency signal it emits.
The principle of signal jammer
Within a certain frequency range, mobile phones and base stations are connected through radio waves to complete data and sound transmission at a certain baud rate and modulation method. During operation, the jammer scans from the low-end frequency of the forward channel to the high-end frequency at a certain speed. This scanning speed can cause garbled interference in the message signal received by the mobile phone. The mobile phone cannot detect the normal data sent from the base station, so that the mobile phone cannot establish a connection with the base station, achieving the purpose of blocking the mobile phone signal. The mobile phone behaves like searching the network, no signal, Serverless systems and other phenomena.