Joy Voice Control Box

The joy sound control box can also be turned into a speaker amplifier! Take the phone and put it in the carton, and the sound will become louder instantly. What is going on? Take you there. The principle is very simple. The reason why we usually hear sound is because the diaphragm of the horn or headphones vibrates, so that the air molecules vibrate together and are transmitted to our ears. This box speaker is the extension diaphragm. The range of vibration forms a speaker to achieve the resonance effect, so the music becomes louder.