Ambient noise tomography is a rapidly emerging field of seismological research. This paper presents the current status of ambient noise data processing and its development history over the past several years, with the...Ambient noise tomography is a rapidly emerging field of seismological research. This paper presents the current status of ambient noise data processing and its development history over the past several years, with the intention to explain and justify this development through salient examples. The ambient noise data processing procedure can be divided into four principal phases： ① single station data preparation; ② cross- correlation and temporal stacking; ③ measurements of dispersion curves （ performed with frequency-time analysis for both group and phase speeds） ; ④ quality control, including SNR analysis and selection of the acceptable measurements. In addition, we provide a specific solution for a better use of the seismic station data to ambient noise study.展开更多
Animals have special solution to the problem of communication in high levels of background noise. A small group of vertebrates (bats,dolphins and whales,and some rodents) that use ultrasound for communication.Our rese...Animals have special solution to the problem of communication in high levels of background noise. A small group of vertebrates (bats,dolphins and whales,and some rodents) that use ultrasound for communication.Our research first demonstrated that the concave-eared torrent frog is the first non- mammalian vertebrate found to be capable of pro- ducing and detecting ultrasounds for communica- tion.This study may provide a clue for understand- ing why humans have ear canals and how animals auditory systems have evolved,and inspire in de- veloping bionic tecnology for improving hearing in noise.展开更多
基金Jointly funded by the Natural Science Foundation of China(40774018)the Seismic Scientific and Technological Spark Project,China Earthquake Administration(XH13009Y)the Earthquake Research Foundation,Earthquake Administration of Anhui Province(20120702)
文摘Ambient noise tomography is a rapidly emerging field of seismological research. This paper presents the current status of ambient noise data processing and its development history over the past several years, with the intention to explain and justify this development through salient examples. The ambient noise data processing procedure can be divided into four principal phases： ① single station data preparation; ② cross- correlation and temporal stacking; ③ measurements of dispersion curves （ performed with frequency-time analysis for both group and phase speeds） ; ④ quality control, including SNR analysis and selection of the acceptable measurements. In addition, we provide a specific solution for a better use of the seismic station data to ambient noise study.
文摘Animals have special solution to the problem of communication in high levels of background noise. A small group of vertebrates (bats,dolphins and whales,and some rodents) that use ultrasound for communication.Our research first demonstrated that the concave-eared torrent frog is the first non- mammalian vertebrate found to be capable of pro- ducing and detecting ultrasounds for communica- tion.This study may provide a clue for understand- ing why humans have ear canals and how animals auditory systems have evolved,and inspire in de- veloping bionic tecnology for improving hearing in noise.
