Majeri himself replied to Gazzeri's objection by explaining that sound is described by three factors, namely tone, intensity and timbre. The tone depends on the sound's frequency, the intensity is the "strength" of a sound, while the timbre depends on the material of the "sounding body" (Italian : corpo sonante). Different sounds such as a double bass and a bell may have the same tone and intensity, but they are often perceived as different sounds. The difference is given by the timbre. Since intensity and tone but not timbre are meaningful and employed in acting schools, Gazzocchi's objection, according to Majocchi, is unreasonable "by itself".