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HRTF filtering effect. A head-related transfer function (HRTF) is a response that characterizes how an ear receives a sound from a point in space. As sound strikes the listener, the size and shape of the head, ears, ear canal, density of the head, size and shape of nasal and oral cavities, all transform the sound and affect how it is perceived, boosting some frequencies and attenuating others.
[1] [2] The 2005 NASA Authorization Act designated the American segment of the International Space Station as a national laboratory with the goal of increasing the use of the ISS by other federal agencies and the private sector. [3] Research on the ISS improves knowledge about the effects of long-term space exposure on the human body.
Cosmic noise, also known as galactic radio noise, is a physical phenomenon derived from outside of the Earth's atmosphere.It is not actually sound, and it can be detected through a radio receiver, which is an electronic device that receives radio waves and converts the information given by them to an audible form.
A Laplace resonance is a three-body resonance with a 1:2:4 orbital period ratio (equivalent to a 4:2:1 ratio of orbits). The term arose because Pierre-Simon Laplace discovered that such a resonance governed the motions of Jupiter's moons Io , Europa , and Ganymede .
The resonance properties of a cylinder may be understood by considering the behavior of a sound wave in air. Sound travels as a longitudinal compression wave, causing air molecules to move back and forth along the direction of travel. Within a tube, a standing wave is formed, whose wavelength depends on the length of the tube.
The BAO signal is a standard ruler such that the length of the sound horizon can be measured as a function of cosmic time. [3] This measures two cosmological distances: the Hubble parameter, H ( z ) {\displaystyle H(z)} , and the angular diameter distance , d A ( z ) {\displaystyle d_{A}(z)} , as a function of redshift ( z ) {\displaystyle (z ...
Biochemist Martin Gruebele regularly dons a pair of headphones in his lab at the University of Illinois. But instead of music, he listens to a cacophony of clinking, jarring noises — as if a ...
During summertime in shallow coastal waters, low-frequency sound-waves have been observed to propagate in an anomalous fashion. The anomalies are time-dependent, anisotropic, and can exhibit abnormally large attenuation. Resonant interaction between acoustic waves and soliton internal waves have been proposed as the source of these anomalies. [11]