Compared with a traditional DVA, the proposed DVA with negative stiffness achieves enhanced vibration transmission suppression performance for a much broader absorber frequency range around resonance and with a much smaller size of mass, which is very favorable for a marine shafting system.
A much broader range of frequencies was recorded by the land-streamer method, which is a result of a high-level coupling of the geophone and its shape as shown in Fig. 8a.
Researchers from Princeton have made ears that capture sounds over a frequency range much broader than that perceived by human ears.
Auditory neurons tend to show frequency selectivity only near the perceptual threshold, while at relatively high sound intensities auditory filters are much broader [55], and show more moderate frequency sensitivity.
In contrast, tributary channels are distributed horizontally across much broader, flat regions, which results in high-frequency lateral migration and low-frequency vertical accretion.
Owing to the coupling of Bragg reflection and dual HR's resonances, a periodic dual array can provide much broader noise attenuation bands at the designed resonance frequencies of the dual HR.
Unlike the much higher frequency of Wi-Fi, television broadcast frequencies can travel for miles and penetrate walls, providing a much broader range for Internet service.
Also, the bandwidths of frequency-specific suppression in our data are much broader than peripheral tuning (see Evans et al., 1992; or in the brainstem, Sayles & Winter, 2010), suggesting that a considerable degree of across-frequency convergence precedes the two-tone frequency specificity we report.
However, the bands appear much broader, and the negative band at 3617 cm 1 is at a lower frequency and the positive band at 3602 cm –1 at a higher frequency relative to the corresponding bands in CaChR1.
The frequency distribution for fusions of rays 3 and 4 was much broader and was only slightly skewed.
