Frequency (Tension) for a single 1.25 mm nylon string of length 32 cm.

380 Hz (7.5kg) 400 Hz (8.5 kg) 420 Hz (9 kg) 440 Hz (10.5 kg)

490 Hz (13.5 kg) 500 Hz (14 kg) 520 Hz (15 kg) 550 Hz (17 kg)

560 Hz (18 kg) 580 Hz (19 kg) 600 Hz (20 kg) 620 Hz (21.5 kg)

640 Hz (23 kg) 660 Hz (25 kg) 680 Hz (26 kg) 700 Hz (28 kg)

What is the stringbed frequency of this fully strung racquet? (It is 600 Hz).

If you have trouble identifying these sounds, you might prefer to try the selection of pure tones recorded using with a signal generator , ranging from 100 Hz to 3000 Hz.

Further information on the vibration frequencies of a single string and the whole stringbed is documented in the attached pdf file and in the original 2001 Sports Engineering paper on this subject.