A single trombone is sounding with a sound intensity level of 68 dB. When joined by three other identical trombones playing the same note at the same volume, the sound intensity level will be

How Did I Do? A single trombone is sounding with a sound intensity level of 68 dB. When joined by three other identical trombones playing the same note at the same volume, the sound intensity level will be B = Number dB