Can't guarantee the same for the apps on phones though as they are often software solutions based on general phones so it depends on how the software has been written. Regarding how accurate are digital tuners, they are based on quartz crystal oscillators that usually are easily accurate to 50 parts per million so, essentially, they are very accurate. This meant that every orchestra would tune to a different pitch than every other. For a long time, there was a lack of any international standard for musicians to tune their instruments to. For the final tuning, I did let it cool down between grinds and checks just in case the temperature had a significant effect. Over the centuries, the tones that comprise western music have fluctuated wildly. It's certainly not changed it noticeably. I was easy to keep both tines the same length by eye and the sustain on both seems the same as it was before. It wasn't touchy either, it's not critically minute amounts taking off, just don't go daft. This illustrates the relationship between waves and vibrations. It's not rocket science or even heavy engineering. In this video I demonstrate a tuning fork being struck and then dipped into water in a beaker in slow motion. Just got my guitar chromatic tuning meter and used my bench grinder to take equal amounts off the tines' ends a bit at a time until the frequency was right. Just adjusted two A tuning forks I had to A#/Bb for my trumpet. The tone probably isn't as pure, and tape will eventually age and wear, but this quick fix should work well enough until my next trip to a good music store for a better quality tuning fork. The fork also now sounds good when played simultaneously with an mp3 of a 440 Hz tone to check for beats. A little more fine trimming of the length of the tape with some sharp scissors, and I got the fork to measure within +-1 cent of 440 Hz, as measured against several calibrated iPhone tuners (both dial and strobe). Wrapped the new lengths of tape on the fork tines, and the fork rang 3 cents flat. Then I cut some tape strips about 9/29ths as long (actually a few mm longer). So I removed those pieces of tape and carefully measured them. If they show it to be a 440 then maybe your tuners are out. The 16820 Tuning Fork is the essential tool for accurate piano tuning, made of nickel plated steel and is tune to A 440 Hz. If their check shows it is a 442 then they can replace it. Update based on the comment that you had bought a 440 fork: Take it back to the shop, get them to check it. If you need a 440 youll need to just buy one. That also lowered the frequency, by only a bit too much, to 20 cents flat. If not it is probably supposed to be a 442 tuning fork. Next I tried a couple strips of masking tape wrapped around the very end of the each tuning fork tine. Two big rubber bands on the tines clearly lowered the frequency. So I played science student, and tried the experiment. I found a quick-and-dirty temporary solution.Īs an online education forum suggested, a interesting school science experiment might be to see if adding weights and changing their position on a tuning fork will change the frequency of the fork.
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