7). Periodoc change in the pitch of a musical tone is called VIBRATO.
8). When many identical instruments play the same part in unison, the sound attains a quality considerably different from that of any of the individual instruments. This phenomenon is called chorus effect.
9). A triangle wave and a square wave have different waveshpes. So, they cannot have the same timbre.
10). The decible scale is a logarithmic scale used for comparing sound levels.
7) (1pt) Periodic change in the pitch of a musical tone is called 8) (1pt) When...