Fig. 6
From: In situ acoustic analysis of two twentieth-century heritage carillons
Frequency deviations for the five primary overtones in the Metropolitan and Soldiers’ Tower instruments. It is noteworthy that in both sets of bells the quint and the nominal were not detected for roughly the highest half and full octave of bells, respectively. The red line indicates a moving average (\(n=10\)), indicating the general trend with decreasing bell size