The phrase "a certain attenuation" is correct and usable in written English.
It can be used in contexts where you want to describe a specific reduction or weakening of something, such as a signal, sound, or effect.
Example: "The study revealed a certain attenuation of the signal strength as it traveled through the dense forest."
Alternatives: "a specific reduction" or "a particular weakening".
In the frame of time-delay system, we propose a parameter-dependent sufficient condition such that the closed-loop system with mixed event-triggering mechanism is globally uniformly ultimately bounded with a minimized ultimate bound for a certain disturbance attenuation level.
By associating a microblog user's network information relations with his geographic location, Wang et al. [28] discovered that network information space was geographically rooted and manifested as local information relations dominate in the network information space and network information relations showed certain attenuation over distance.
In a large exposure caused by breakage of a tube containing B. abortus, patients who started therapy immediately after seroconversion was detected and before symptoms developed (10 weeks after the laboratory accident) had a benign clinical course, suggesting that even if the disease was not prevented, a certain degree of attenuation probably occurred (7).
From the test results, we can observe that the vibration acceleration of the upper and lower parts of each mount is reduced to a certain extent, and the attenuation effect of the lower part of the front mount is more evident than that of the others, as shown in Figure 11.
Indeed, when the value of the intensity of the first pixel of the fit was below a certain threshold, the relative attenuation coefficient was fixed at a null value.
In practical ADT, however, the received audio signal usually suffers from heavy attenuation at a certain frequency band or time frame due to the destructive interference of multi-path propagation and the spectral characteristics of the audio signal.
The outdoor experimental results have shown that the largest sound attenuation, within a certain range of frequencies, was obtained for a range of frequencies related to the array periodicity.
Based on the state feedback method, the resulting closed-loop systems are reliable in that they remain robust stochastically stable and satisfy a certain level of H∞ disturbance attenuation not only when all actuators are operational, but also in case of some actuator failures.
Since a projection represents an approximation of the line integral of light attenuation along a certain direction, by collecting multiple projections from several directions (typically 360) we created a dataset suitable for tomographic reconstruction; optically sectioned volumes of the samples were obtained by a filtered back-projection algorithm (Kikuchi and Sonobe, 1994; Fauver et al., 2005).
