1. 41-ET also closely matches a number of other intervals involving higher harmonics . 2. Moreover, it is plucked relatively closer to the bridge, which emphasizes higher harmonics . 3. Some lock-in amplifiers also allow separate measurements of these higher harmonics . 4. In the case of nonlinear systems, higher harmonics of the modulation frequency appear. 5. Their output waveform is also perfectly sinusoidal without noise or higher harmonic output. 6. Now we are well within the range of cymbals and other higher harmonic timbres. 7. The pressure changes within a medium cause the wave energy to transfer to higher harmonics . 8. By boosting high frequencies and overdriving the speaker or amplifier slightly, higher harmonics can be generated. 9. For example, one waveform has an octave-unison effect where the higher harmonics fade in over time. 10. Sirens generate low frequencies, but with high sound pressure levels distortion appears that leads to higher harmonics .
