Underwater acoustics

Introduction: In this lab the speed of sound was found by using standing waves. A tube with a speaker at the top of it was playing at a constant frequency. As the speaker played, the tube filled with water. The reflections in this lab caused destructive interference. When waves reflect and they are on two sides of the medium the sound cancels out and there is no noise. Where this occurs it is called a node and with the nodes the wavelength could be measured because the distance between two nodes

Module: Clinical Instrumentation Module Code: 5BM020 Echocardiography Word count: 1973 21/1/2015 Raj Chavda 1112009 Introduction In this essay I will be discussing the importance of echocardiography in clinical practice as they are used for screening, diagnosis, guiding treatment, assessing recovery and monitoring care. I will be discussing the principles in which make echocardiography possible, the importance of selecting the correct electromedical technique, the advantages

Introduction A range of observations were conducted to assess acoustic spaces in terms of their characteristics and ambient noise levels. Using a Digitech QM 1589 (see figure one) three studies were measured in order to successfully account for characteristic behaviours and differentiate between ambient noise levels. These studies where assessed under A and C weightings and in fast and slow settings. A weighting follows the frequency sensitivity of the human ear at low Figure One: Digitech QM 1589

INTRODUCTION Study shows that now day’s noise became one of four major pollution types in the world, it can cause any kind of health problems such as sleep disorder, cardiovascular disease, and hearing loss. It is really imperative to produce and use environmental friendly and cost effective materials which can reduce the sound pollution, due to their abundance natural fibres such as wood, coconut shells and hemp are holding great potential of substituting the expensive synthetic fibres from manufactures

extravagant than ever before, they were engineered in a way that their acoustics are still being studied and replicated today. The exterior elements of the Renaissance era domes were considered to be impressive artistically, but the interior elements were unique to many as well. Looking at such buildings today, you can see the detailed work that had been put in for many years in order to create such a beautiful building. The acoustics inside the dome were carefully crafted and incorporated into the structure

II. Restriction on Loudspeakers Now a days it is very difficult to deal with the issue of Noise. In early times there was no disturbance to students by early worshipping of various religious temples but now this has increased and I wonder how will students like us who study in morning be able to work in this. Then came the judgment of Supreme Court in 2005 Issue: Supreme court on Noise Pollution • All types of horns (some are extremely loud) in automobiles, factories, industries, painting of cars

Acoustic Theory and Synthesis Frequency: Frequency means the number of cycles per second and depending on the amount of cycles per second determines how high or low pitched the sound is and the time that it takes to complete one cycle is called the period. Frequency is measured in Hertz (Hz). And An average human is able to hear sounds between 20Hz and 20,000Hz. As the cycles per second increases, the smaller the wavelengths become, therefore there is a higher frequency which will cause

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

Concert Hall Acoustics: Focus on Chan Shun Concert Hall The Chan Centre for the Performing Arts is an acoustic marvel. It was built in 1997 and was designed by Bing Thom Architects in conjunction with Artec Consultants and Theatre Projects and is situated at the University of British Columbia. The Centre has won many awards for it’s architectural design and acoustics. David Harrington, the Artistic Director/Violinist of 
Kronos Quartet says it very well: "The Chan Centre...has the rare distinction

Sound Essay What do you think when you hear sound? Do you think of the old tale that says if a tree falls in the woods and no one is around to hear it, does it make any noise? Or do not question it and move on with life. Believe it or not sound is everywhere. Sound works in many different ways, to fully understand it, let's break it down into three main pieces. First of all sound is energy, next sound can change, Lastly to hear and to understand are two different things.