| ??? 06/22/06 14:27 Read: times |
#118855 - Tuning instruments. Responding to: ???'s previous message |
Yes, I think that's what I meant. Maybe Andy can discuss about this a bit, as he is an educated piano player?
Playing several instruments myself, I can say that with some training, it is easy to hear when an interval is "clean" or not. No beat frequencies are necessary for tuning a piano this way (since the beat frequencies of two different notes would be way too high to count). Whether this works even at very high audio frequencies (17kHz, or so) could easily be checked: Use two different audio amplifiers with two individual loudspeakers and output 17kHz by the one and 19kHz by the other. What can you hear now? (Take care, use rather small signals to not overload the tweeters...) You could just mix the two signals digitally and play them. You would hear two separate tones (that is, if you can hear frequencies that high, and your audio equipment is of sufficient quality). In order to get noticable intermodulation, you need to have a nonlinearity that has a rectifying characteristic (think "diode"). The human ear doesn't do that. |
| Topic | Author | Date |
| High pitched ring tones | 01/01/70 00:00 | |
| LM556 | 01/01/70 00:00 | |
| Download The Ring Tone. | 01/01/70 00:00 | |
| Adding signals with two frequencies | 01/01/70 00:00 | |
| Sure? | 01/01/70 00:00 | |
| Yes, quite sure. | 01/01/70 00:00 | |
| Intermodulation not beat frequencies | 01/01/70 00:00 | |
| Remember piano tuners | 01/01/70 00:00 | |
| A test should tell it | 01/01/70 00:00 | |
| Tuning instruments. | 01/01/70 00:00 | |
| Yes, but... | 01/01/70 00:00 | |
| Mixing 2 ultrasonic frequencys | 01/01/70 00:00 | |
| Cool! | 01/01/70 00:00 | |
| We experimented with the "ionovac" | 01/01/70 00:00 | |
Mixing two rf signals | 01/01/70 00:00 | |
| Adding signals with two frequencies | 01/01/70 00:00 | |
| Don't do that! | 01/01/70 00:00 | |
| I'm with Andy | 01/01/70 00:00 | |
| active noise reduction | 01/01/70 00:00 | |
| Rest your fears | 01/01/70 00:00 | |
| a better idea | 01/01/70 00:00 | |
| Detecting high pitch sounds | 01/01/70 00:00 | |
| No, no, do it the hard way | 01/01/70 00:00 |