Acoustic transmission is the transmission of sounds through and between materials, including air, wall, and musical instruments.wikipedia
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Technical solutions depend on the source of the noise and the path of acoustic transmission, for example noise by steps or noise by (air, water) flow vibrations.
1) Airborne transmission - a noise source in one room sends air pressure waves which induce vibration to one side of a wall or element of structure setting it moving such that the other face of the wall vibrates in an adjacent room. Structural isolation therefore becomes an important consideration in the acoustic design of buildings. Highly sensitive areas of buildings, for example recording studios, may be almost entirely isolated from the rest of a structure by constructing the studios as effective boxes supported by springs. Air tightness also becomes an important control technique. A tightly sealed door might have reasonable sound reduction properties, but if it is left open only a few millimeters its effectiveness is reduced to practically nothing. The most important acoustic control method is adding mass into the structure, such as a heavy dividing wall, which will usually reduce airborne sound transmission better than a light one.
impedanceacoustical impedanceradiation impedance
The degree to which sound is transferred between two materials depends on how well their acoustical impedances match.
Musical instruments are generally designed to radiate sound effectively.
stethoscopesbell of the stethoscopeelectronic stethoscope
Stethoscopes roughly match the acoustical impedance of the human body, so they transmit sounds from a patient's chest to the doctor's ear much more effectively than the air does.
attenuationattenuatedattenuation of sound
absorption coefficientattenuationAbsorption coefficients
noisesound pollutionnoise control
sound pressure levelSPLacoustic pressure
Sound Transmission Loss
Sound transmission class
acoustic dampeningdecouplingnoise damping
Sound transmissions: by reducing transmission using many methods (depending whether the transmission is through air, liquid, or solid), or
acousticsC-SAM acoustic microscopic inspectionultrasonic force microscopy
Samples need no special treatment before acoustic imaging, but they should be able to withstand at least brief exposure to water or to another fluid, since air is a very poor transmitter of high frequency acoustic energy from the transducer.
As mentioned, they are sutured to the tubera basioccipitalia, and so could not have moved freely, meaning that they were not bones for the transmission of sound in this manner.
insulated concrete formsInsulating Concrete Formscast-in-place concrete
ICF walls have much lower rates of acoustic transmission.
curtain wallcurtain wallsglass curtain wall
Larger thicknesses are typically employed for buildings or areas with higher thermal, relative humidity, or sound transmission requirements, such as laboratory areas or recording studios.