What is the sign prohibiting talking loudly?

1. Noisy sign is a sign with speakers and bars in the circle, which is usually used in meeting rooms or public places.

The sign of "No Loud Talk" is a red circle with one hand covering one lip, which is usually used in libraries and other places.

3. The sign prohibiting loud noise is a humanoid pattern in a red circle with some sound waves and a bar beside it.

brief introduction

These signs usually appear in public places. These signs can be reflected on the roof where loud noises are forbidden, and they can also appear in cinemas.

Because if a person makes a loud noise, it may affect others to watch movies, so such a sign may appear in such a cinema, and the same principle can also be applied to other public places.