First of all, satellites are not equipped with horns. Vacuum can't transmit sound, and sound transmission needs medium.

Secondly, Dongfanghong-1 satellite is transmitted and broadcast by electromagnetic waves. It was broadcast to prove that China people also built a satellite. What can he do with Putnik 1 (also called a companion)? It can only make a drip sound to prove its existence.

And Dongfanghong, who can sing. Obviously, it's a little ahead of schedule.

As for why, in fact, the satellites were designed to compete for political power. Otherwise, how did the cold war come out? The former Soviet Union went into space and the United States went to the moon.

Secondly, the satellite is powered by dry batteries, and it loses its communication ability after several weeks of launch and is scrapped.

So now you can't hear it.