Acoustics

This is analogous to an electrical system when electrical flow is opposed it causes a voltage applied to the system. In acoustics, the impedance is defined as the ratio of pressure to flow. 2.1.2 Micro Properties It is at the micro scale at which the material acts with the fluid. Micro properties are the geometry details that define the interaction between sound and the material…

Introduction For several years many people believed that the key secret to achieving ones highest creativity was background noise. The human brain has the functionality to multitask, each section of the brain has a specific purpose. According to Merriam Webster, concentration is defined as: 1. “The action or power of focusing one’s attention or mental effort” 2.” Exclusive attention to one object, Close mental application.” So according to text, people should single in their attention and…

The reason why engineer’s might bring in effects to a vocal track is mostly to create an aural space or even to add excitement. Many engineers describe effects as something that can make the vocal track sound deeper, wider or even bigger. “Everything has to be bigger always. Effects are makeup. It’s cosmetic surgery. I can take a very great song by a very great band and mix it with no effects on it at all, and it’ll sound good, and I can take the same song and mix it with effects and it’ll sound…

Childhood apraxia of speech (CAS) CAS is a pediatric neurological speech sound disorder. This disorder impairs the precision and consistency of the movements that underlie speech. However neuromuscular deficits are absent. It may be the result of a known neurological impairment, and include complex neurobehavioral disorders with known or unknown origins. It may also occur as an idiopathic neurogenic speech sound disorder. The main impairment in planning and/or programming spatiotemporal…

extravagant than ever previously created before. The exterior elements of the dome during the Renaissance architecture period were impressive to many by themselves, the interior elements were unique as well. The acoustics inside of the dome were a major focus as well as the structure itself. The acoustics of multiple cathedrals in Italy were designed to enhance the hearing for the type of music that was performed at this time. The Renaissance introduced the use of “polyphony”, which is a…

frequency variation strategy was able to reduce switching losses up to 20% over the conventional constant switching frequency SVPWM and DPWM2 techniques. This strategy also spreads peaky harmonic spectrum of the output waveform which may help in reducing acoustic noise, however, consequent introduction of lower frequency harmonics in the spectrum increase current THD which may heat up the motor and the magnet. Thus, in the future study, hardware validation will be done to test the impact of the…

and attributed into distinct perceptual streams analogous to the distinct sound sources in listeners’ environment (Bregman, 1990; Moore & Gockel, 2002; Carlyon, 2004). The process with which the nervous system makes sense of complex patterns of acoustic stimulation is called auditory scene analysis (Bregman, 1990). Thus, segregating the sounds arising from various sources in the environment, leading to an internal representation of auditory streams becomes the goal of auditory scene analysis.…

Introduction The acoustic reflex (AR) describes the involuntary contraction of the stapedius tendon in response to high-intensity sound (Emanuel, 2009). An intricate neural network, receiving afferent input from the vestibulocochlear nerve and sending efferent output to the facial nerve, controls contraction (Emanuel, 2009). The reflex is intensity-dependent, as particular intensities cause the contraction. Once contracted, it lessens the vibrations traveling through the stapes footplate as it…

the object before returning to the transducer. The strength of the echo is continually decreasing, and the time it takes to return is prolonged, resulting in multiple objects of decreasing intensity appearing. Acoustic enhancement occurs when sound passes through an area of very low acoustic impedance into tissue whose impedance is much higher. This appears as a hyperechoic region beneath tissues with abnormally low attenuation. Hyperechoic regions are brighter and the same color as the…

Ultrasound is a method of creating the best possible images to assist the Radiologist in the diagnosis of a patients pathology. This process occurs through sound waves. These sound waves have a frequency that is far beyond what humans can hear, although using these sound waves we are able to transmit ultrasound energy into the patient. Once the energy is inside the patient the structures reflect and distribute the sound which creates an echo. This echo is what allows us to produce an image of…