Speaking loud to hear clearly, but don't shout or to howl (at) Don't speak too fast or slow. Speaking to the audience, smiling eyes, customers make a customer feel impression.
Speaking loud and clear Do not yell or shout Do not speak too fast or too slow Speaking to an audience looking Smiling at customers Customers make an impression
Speak loud and clear sound, but do not shout or yell, don't say fast or slow. Say to look at the audience. Smile at the customers, making customers feel impressed.