Measurements of five models of metronome: Neewer, Neewer (photo),
Patent, TB 06 and TB 07. The first two correspond to a
contemporary metronome, a Neewer NW-707. The difference is that Neewer
corresponds to precise direct measurements in a dismantled metronome, while
Neewer (photo) measurements were taken from a photograph. The rest of
the models follow this methodology. The third one, Patent, corresponds
to the original diagram from Maelzel's 1815 English patent. Finally,
TB 06 and TB 07 are metronomes number 6 and 7, respectively,
from Tony Bingham's collection (see the references).
Format
metr.neewer provides oscillation frequency measurements for the
Neewer metronome.
mark | metronome mark, in pulses per minute. |
bpm | measured frequency, in pulses per minute. |
bpm.se | standard error of bpm, in the same units. |
metr.marks provides position measurements of each metronome
mark for all the metronomes.
model | metronome model. |
mark | metronome mark, in pulses per minute. |
r | distance from the shaft to the mark, in mm. |
r.se | standard error of r, in the same units. |
metr.params provides measurements of fixed dimensions for all
the metronomes. All the additional columns suffixed with .se are the
standard errors of the corresponding variables in the same units.
model | metronome model. |
rcm | position of the center of mass of the upper mass with respect to the metronome mark, in mm. |
l | length of the rod over the shaft, in mm. |
R | distance from the shaft to the center of mass of the lower mass, in mm. |
L | length of the rod below the shaft, in mm. |
A | oscillation amplitude, in degrees. |