Also, it is found that the coincidence between the traveling seismic wave and characteristic waves of the viaduct will generate additional resonant frequencies located in passbands of the characteristic waves.
In the case of spherical QDs, InAs-like IF phonons have frequencies located in the middle between the frequencies of LO and TO phonons.
The study results show that weak characteristic frequency component located in low-frequency area can be extracted gradually from strong noise background owing to the energy transfer mechanism from high-frequency area to low-frequency area, as a result, a novel low-pass filter can be achieved ultimately.
Its purpose is to raise the energy for those frequency components located in the high-frequency domain in order that those formants can be extracted in the high-frequency domain.
We further provide evidence that pitch misjudgment does not occur in temporal concurrence with the repetition of the whole scale, but according to whether the main perceived frequency is located in the sensitive range of auditory perception or not.
At the azimuthal mode number m⩾1 and near the magnetic plasma frequency and the electronic plasma frequency for the TE wave and TM wave, respectively, we find that there is an additional high-reflectance band and some reflection dips exist when the plasma frequency is located in the photonic band gap.
For example filter 2, k damp_c < 0, while the resonance frequency is located in the high region (f r = 2.34 kHz).
For example filter 1, k damp_c > 0, while the resonance frequency is located in the low region (f r = 1.40 kHz).
Case 1.1: If k damp > k damp_c > 0, the resonance frequency is located in the low region (f r < f s/6), and k damp_c > 0 is satisfied, so a pair of open-loop unstable poles is produced.
Case 3.1: If k damp > 0>k damp_c while the resonance frequency is located in the high region (f s/6 < f r < f s/2), k damp_c < 0 is satisfied and a pair of open-loop unstable poles is produced, similarly to Case 1.1.
