An open-ended acoustic impedance tube is abutted against a material having a known acoustic impedance and a standing wave pattern is established in the tube. A first apparent impedance of the material is derived based on the standing wave pattern. A correction factor is computed based on the ...
百度试题 结果1 题目 The greater the acoustic impedance of the material, the greater the attenuation of the ultrasonic propagation.( ) 相关知识点: 试题来源: 解析 错误 反馈 收藏
声阻抗最大的是()Which tissue has the highest acoustic impedance?A.颅骨skullB.肺lungC.肌肉muscleD.
impedance- a material's opposition to the flow of electric current; measured in ohms electric resistance,electrical resistance,ohmic resistance,resistivity,resistance electrical phenomenon- a physical phenomenon involving electricity ohmage- the ohmic resistance of a conductor ...
Specific acoustic impedance is the complex ratio of the effective sound pressure at a point to the effective particle velocity at a point. The unit is the N · s/m3, or the mks rayl. In the cgs system the unit is the dyn · s/cm3, or the rayl. The difference between specific acoust...
transfer of the charge (ions/electrons) through the metal interface, react with the oxygen from the steel surface, with the subsequent growth of an unstable corrosion product in the form of a thick porous-oxide layer (also known as rust), which occupies more volume than the original material...
Sound-absorbing panels in which wood fiber is combined with cement mortar, so-called acoustic fibrolite, are also used. The choice of material depends on the acoustic conditions, the purpose, and the architectural features of the room. Sound-insulating sealing materials are used in the form of...
acoustic (əˈkuːstik)adjective having to do with hearing or with sound.This hall has acoustic problems.acústico aˈcoustics 1.noun pluralthe characteristics (egof a room or hall) which make hearing in it good or bad. 2.noun singularthe science of sound. ...
college fee college food service college frere albella college is the four y college moral educati college of advanced e college of business a college of cardinals college of communicat college of economics college of engineerin college of health beh college of health and college of humanities ...
b.Designed to absorb or control sound:acoustic tile. 3.Music a.Of or being an instrument that does not produce or enhance sound electronically:an acoustic guitar; an acoustic bass. b.Being a performance that features such instruments:opened the show with an acoustic set. ...