Acoustics in Music Through out the history of music, acoustics have played a major role. After all if it were not for acoustics the quality of sound that we know today would not exist. The word acoustics comes from the Greek word akouein, which means, “to hear”(Encarta Encyclopedia). Since music has to be heard in most cases for enjoyment, acoustics obviously take on a very important role in the pleasure that music brings to the ear. Acoustical architecture and design are two key elements in
A flute blows a rapid jet of air across the embouchure hole. The pressure inside the players mouth is above atmospheric (usually 1kpa: just enough to support a 10cm height difference in a water manometer). (http://newt.phys.unsw.edu.au/music/) The work done to accelerate the air in this jet is the source of power input to instrument. Sound requires an oscillating motion or air flow. In the flute, the air jet, and the resonance in the air in instrument produces an oscillating component of the
My Communications coursework will be on non-radio communications. My chosen topic is underwater acoustics. The applications of underwater acoustics and their advantages and disadvantages will be studied. All forms of non-radio communications are based on waves. Waves are generally a disturbance in a surface, transferring energy from A to B. Waves can be mechanical vibrations travel through a medium. For example: water, sound. These waves are called mechanical waves. Progressive waves are
Acoustic Waves in Physics An acoustic wave can simply be described as a longitudinal wave. A longitudinal wave is a wave that vibrates and moves in the direction of its propagation. This means the medium is either in the same or opposite direction of the way the wave travels. Acoustic waves are a form of Mechanical longitudinal waves; these waves are otherwise known as compression waves or compressional waves. Compressional waves obviously produce compression, decompression, and rarefaction to
Acoustic levitation to help Medicines Unless you travel into the vacuum of space, sound is all around you every day.. You hear sounds; you don't touch them. But as the vibrations that sound creates in other objects. The idea that something so intangible can lift objects can seem unbelievable, but it's a real phenomenon. Acoustic levitation takes advantage of the properties of sound to cause solids,and liquids to float. The process can take place in normal or reduced gravity. To understand how acoustic
Careers in Acoustic and Audio Equipment Design Audio engineers have an interesting combination of character traits. On the one hand they tend to love music and want to have a hand in creating it. On the other hand they are also lovers of technology and ‘cool gear’. Along with an interest in technology usually comes an interest in understanding how it works – a desire to master the technology. With some people also comes a desire to go beyond the latest gear and ‘do it better’. They have a
The Effect of Underwater Acoustics on Whales Whales utilize acoustic frequencies to communicate underwater. If the whales are unable to communicate their bi-annual migration can become perilous. Man-made low frequency sonarcan prevent whales from producing soundand sometimes causes them to take alternate routes. When the whales try to avoid the sonar they are in danger of running ashore and perishing after being beached. Introduction: Twice a year, around the months of December and
Physics of an Acoustic Guitar I have been watching my husband play the guitar in a band for five years and he has made it look so easy to make such beautiful music. Most guitar players have progressed with the technology of electric guitars, but when my husband picks up an acoustic guitar and starts to play a song for just me, I hear his love for me in the sounds that he produces. Imagine my surprise when a physics class conveyed to me that there was much more to his playing than I had imagined
ATRAC: Adaptive Transform Acoustic Coding for MiniDisc Abstract -------- ATRAC is an audio coding system based on psychoacoustic principles. The input signal is divided into three subbands which are then transformed into the frequency domain using a variable block length. Transform coefficients are grouped into nonuniform bands to reflect the human auditory system, and then quantized on the basis of dynamic sensitivity and masking characteristics. ATRAC compresses compact disc audio
A surface acoustic wave (SAW) resonators are widely used for frequency selection in mobile and wireless transmission systems [1]. SAW devices consist of piezoelectric substrate, interdigital transducers (IDT) and reflectors deposited on top of the substrate [2]. When voltage is applied at the electrodes, it generates electric fields, which produces piezoelectric strains propagating in both directions as shown in Fig. 1(b). Thus, surface acoustic waves are generated through inverse piezoelectric effect
Room acoustics "A person with normal hearing will commonly experience same difficulty in understanding speech in a large auditorium, even it has been well designed because the unamplified voice of the average person is generally inadequate to 'fill' the auditorium. Consequently, a person with even a minor hearing impairment may have considerable difficulty in listening to speech in large rooms. As a result, complaints concerning the poor acoustics of an auditorium may come from a person with slightly
Madison Thomas 7th period 11-30-17 Research Paper Acoustics Acoustics is a science that deals with the study of sound. It is known to be one of the branches of physics; studying oscillations and sound waves from the lowest to high frequencies. Acoustics is known to be one of the oldest sciences, and dates back to ancient times as people had the need to understand the nature of speech and hearing. The main reason acoustics was discovered and is one of the oldest sciences is because of the need
How do listeners extract the linguistic features of speech sounds from the acoustic signal? Speech sounds can be defined as those that belong to a language and convey meaning. While the distinction of such sounds from other auditory stimuli such as the slamming of a door comes easily, it is not immediately clear why this should be the case. It was initially thought that speech was processed in a phoneme-by-phoneme fashion; however, this theory became discredited due to the development of technology
listening. Mankind is constantly being bombarded by acoustical energy. The challenge to humanity is to translate this energy into meaningful data. Speech perception is not dependent on the extraction of simple invariant acoustic patterns in the speech waveform. The sound's acoustic pattern is complex and greatly varies. It is dependent upon the preceding and following sounds (Moore, 1997). According to Fant (1973), speech perception is a process consisting of both successive and concurrent identification
hypoechoic image from scanning some masses and fatty plaque. Since you can have something with low echogenicity you can also have an image with high echogenicity which we refer to as hyperechoic. This means that along with having a significantly different acoustic impedance there is also less attenuation due to absorption but more attenuation due to reflection. Being hyperechoic you will have higher reflected signals which can make something (like fibrous plaque) appear to be brighter than the surrounding
are trains, planes, and automobiles. Industrial and construction noise can also contribute to external noise. In order to better define the noise present in a classroom, we must look at the classroom acoustics when the classroom is unoccupied and compare that to when the classroom is occupied. Acoustic standards recommended that maximum background noise levels for classrooms smaller than 10,000 ft3 do not exceed 35 dBA. Reverberation time (RT) should not exceed 0.6 seconds (ANSI SOURCE). Sadly, many
surveys of the Hamilton and Scourge that are located in Lake Ontario as well as those located in the Mediterranean and Black Seas. Acoustic mapping, high-resolution video, and robots were used in the excavations of the Titanic and the Bismarck. The article then goes on to describe the various techniques that are used in underwater archaeology. The first was acoustic imaging, which uses sound waves to map the sea floor by the reflections. This method is useful where the area is too dark to use video
hear, we can better accommodate them in our day to day interactions. There are many approaches to the explanation of the elderly's difficulty with rapid speech. Researchers point to a decline in processing speed, a decline in processing brief acoustic cues (Gordon-Salant & Fitzgibbons, 2001), an age-related decline of temporal processing in general (Gordon-Salant & Fitzgibbons, 1999; Vaughan & Letowski, 1997), the fact that both visual and auditory perception change with age (Helfer, 1998), an
regions rarefactions. The equation of sound waves is speed = wavelength x frequency or v = f x . The instrument that will be analysed in this report is the acoustic guitar. An acoustic guitar is any guitar that uses acoustics as a means to transmit the strings vibrational energy to the air to produce a sound. The sound from an acoustic guitar is initiated by the strings. When plucked with the fingers or a plectrum it creates vibrational energy which is then transferred to the soundboard or soundbox
creating simple complex musical pieces while gaining dexterity and technique. They can learn musical processes with keyboards and have fun at the same time. Electronic instruments can also be used in performance to enhance traditional and electronical-acoustics ensembles. A musical performance consists of a series of sounds played in time with appropriate tempo and dynamic changes. MIDI data, however, consists of a stream of information of note events generated by the electronic controller device. This