Increase the power of a signal

An amp and primitive man

I must have been surprised when for the first time I heard my voice passing this stuff and it suddenly turned very loud

I must be awkward and very careful to make my voice, afraid that my voice can destroy something out there

I must have realized from then on, I no longer need to shout the various sounds to signal, no longer need to blow something, nor need to beat on something

I must have realized from then on, the silence would go away, replaced by unlimited noise

Now, I put both palms in my mouth, clasped them both by leaving a cavity in front of my O-shaped mouthhole, and began to breathe in order to blow out a sound

Unfortunately, there is not any sound that comes out of my mouth, just empty breath, many times I try the same thing, but always empty breath, then I really have lost my ability