A scheme was proposed to summarize the frequency range of interest for tire-pavement noise into two passbands differentiating the low- and high-frequency behaviors that have long been observed as causing tire-pavement noise. In an attempt to separate the behaviors' mechanisms, low-pass and high-...
The cutoff frequency of a filter is taken where the spectrum has decreased by 3 dB from its unattenuated level, usually the level in the passband (see Figure 4.21B–D). For a filter, the nominal gain region, the frequency region where the signal is not attenuated more than 3 dB, is ...