Acoustics

Chapters Acoustics Acoustics is the properties of a space and, how sound is transmitted into it. There are four areas of acoustical concern. The first area is sound isolation, it is unwanted sounds that leak in to the auditorium that affects the performance. These problems occur through doors, windows, walls, flooring, ceiling and ventilation ducts. The second area the interior room acoustics it shows how a room size, shape surface and materials affect interior acoustics and how they could be altered. The third area is mechanical noise, this occurs through ventilation ducts, vibrating compressing units and buzzing light ballasts. The last area is the practice room which is considered as the backstage area. Since the performers are practicing…

easiest to learn. Although that is true for the most part I say that the acoustic guitar is the better choice to be made. With learning on an acoustic the beginner will build up more strength in their fingers and hands. They will work harder to press down the strings with the Acoustic, unlike the Electric where it is easier to press down on the strings. All though there are many positives about the Electric guitar, the Acoustic is the way to go when you are first starting out on learning how to…

A large mound of fat called acoustic lipids[5] and this mound often called a melon[9]. The clicks by the toothed whales are generated within interconnected channels behind the melon .[1] The dolphin is able to change the shape of the melon and become an acoustic lens which condenses the waves in to a beam.[5] The echoes are received at a point in the lower jaw of the animal sometimes called the “acoustic window”. This section is also fat filled and helps the wave travel to the dolphins ear,…

Westerkamp attempts to explore the soundscape of the park and discover how sound harmonize with the visual impression and importance of surrounding sound. This soundwalk has seven spot of listening location: 1.Entrance, 2.Kinfe-Edge, 3.Lookout, 4.Conservatory, 5.Sunken Garden, 6.Creek and 7.Quarry.Westerkamp provide instruction like”Listen to your footsteps and experiment with your own voice” ”Sit down and let the sounds of the flowing water soothe you” etc, to brainstorm the idea of soundwalk,…

Figure 2 demonstrates the variation of positively compensated admittance (Ytm), susceptance (Btm), and conductance (Gtm) as a function of probe tone frequency. While acoustic resistance is independent of frequency, acoustic conductance does vary with frequency. The variation of Ga with frequency can be understood as a variation of Ra and Xa with frequency. Stiffness and mass susceptance are frequency dependent. Mass susceptance is directly proportional to frequency and stiffness susceptance is…

information is finished they then print the image of the patients child from the display. Transducer probe in order to use it you alway need to put gel on the patient's stomach the gel is a clear substances that is made of different chemicals like glycol, water, glycerin, and ect. The reason why the gel needed is because it makes the image on the machine better. In the article Ultrasound Gel For Medical Professionals says, “The gel helps make secure contact between the transducer and the…

The findings revealed the existence of differential speech profiles with features that are consistent with ataxic, spastic and flaccid dysarthria (1, 22-24). The studies compared the perceptual and acoustic findings with instrumental measures and found similar outcomes, hence validating the reliability. Perceptual-based descriptions included imprecise articulation, reduced speech rate and breath support, reduced pitch and loudness variation, increased nasality, and strained-strangled vocal…

chimera is composed from two different sounds; the envelope of one sound and the fine structure of another. Scientists have discovered that human speech is dominated by the envelope information of a speech sound, where as musical melodies is dominated by the fine structure of the sound by using auditory chimeras. Tonal languages utilize speech intonations to express different word meaning and usually include various distinctive pitch contours. For our research, we used auditory chimeras to…

in different scenarios. Inverse filtering is a common dereverberation technique where a suitable filter is designed to nullify the room effect after estimating the room transfer function (RTF) [7]. A two-stage dereverberation algorithm was proposed in [8], which involved room impulse response (RIR) estimation from the null subspace of the data matrix and equalization of microphone signals using multi-channel inverse theorem (MINT) [9]. However, the estimation of the RIRs is a challenging task…

tissues. The difference in acoustic impedance (z) between the two tissues causes reflection of the sound wave (z=density x velocity). The greater the difference in z between two tissues, the greater the reflection. Therefore, if there is no difference in z between the two tissues or boundaries, there is no relfection. The reflection from a smooth tissue interface causes the sound waves to return to the probe. The ultrasound image is then formed from the echoes. Every substance , such as a…