Description
Technical description: Set of eight tuning forks in case; sounding diatonic scale of C major C₄ to C₅.
No inscriptions.
In mahogany case with red baize lining.
Usable pitch: (480/C), measured frequency +/- 0.1 cents, 257.42 Hz; C4 -28.1 cents with respect to A4 = 440 Hz; -10.3 cents with respect to mean of set. (480/D), measured frequency +/- 0.1 cents, 291.58 Hz; D4 -12.4 cents with respect to A4 = 440 Hz; +5.4 cents with respect to mean of set. (480/E), measured frequency +/- 0.1 cents, 325.17 Hz; E4 -23.6 cents with respect to A4 = 440 Hz; -5.8 cents with respect to mean of set. (480/F), measured frequency +/- 0.1 cents, 345.65 Hz; F4 -17.8 cents with respect to A4 = 440 Hz; at mean of set. (480/G), measured frequency +/- 0.1 cents, 388.64 Hz; G4 -14.9 cents with respect to A4 = 440 Hz; +2.9 cents with respect to mean of set. (480/A), measured frequency +/- 0.1 cents, 434.80 Hz; A4 -20.6 cents with respect to A4 = 440 Hz; -2.8 cents with respect to mean of set. (480/B), measured frequency +/- 0.1 cents, 491.80 Hz; B4 -7.3 cents with respect to A4 = 440 Hz; +10.5 cents with respect to mean of set. (480/C), measured frequency +/- 0.1 cents, 518.03 Hz; C5 -17.4 cents with respect to A4 = 440 Hz; +0.4 cents with respect to mean of set.
Mean of set, -17.8 cents with respect to A4 = 440 Hz; equivalent to A4 = 435.5 Hz; rms error, 6.1 cents.
Specific literature references: G.S. (1968) No. 662. |