What is the loudest and quietest instruments in Orchestra?

The loudest instrument in an orchestra is usually the trumpet, especially when played in the high range. It can produce sound at over 110 decibels, which is equivalent to the noise level of a jackhammer.

On the other hand, the quietest instrument in an orchestra is typically the harp. It produces delicate and soft sounds. The strings of the harp are plucked very gently, making them difficult to hear over the louder instruments in the orchestra.