Environmental Acoustics Articles
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What’s Being Done To Detect Water Leaks?
As we all know, water is one of the most precious resources that we have, but it’s all too easy for us to take it for granted, particularly in developed countries where we simply turn on a tap and out it comes. But access to water is coming increasingly under threat around the world, thanks to climate change, urbanisation, population growth, pollution and water mismanagement, and ...
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Stone wool production - Case Study
THE CLIENT The Client is a multinational manufacturer of mineral wood products, a world leader in industrial stone wool solutions, building insulation, acoustic ceilings, and engineered fibres. The Polish plant has 3 production lines with similar wastewater ...
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Project - Definition of an environmental reference for the Boughezoul area
CLIENT WORLEYPARSONS LOCATION Médéa, Tissemsilt, Tiaret and Djelfa Algeria DATE 2015 - 2015 ASSIGNMENTS Preparation of an HSE plan for the field assignment In-depth measurements in order to determine the baseline environmental situation: acoustics, air quality, dust in suspension, soils, water Preparation of the baseline situation report ...
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The Origin of GCRTech
Dr. Chana shares his product evolution journey to creating some of the most technologically advanced instruments for flow, pressure and transient monitoring, and leakage management. Dr. Chana is at heart a problem solver. Over his 35 years in the water industry, some of the leading instrumentation manufacturers have asked him to join their technology teams to develop unique solutions to a newly ...
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The Use of Untethered Acoustic Ball Technology To Locate Leaks in Pressurized Water Mains - Case Study
A CAUTIONARY CASE STUDY: MINNEAPOLIS, MINNESOTA, USA Investor-owned & municipal utilities may experience catastrophic damage if it relies on Untethered Acoustic Ball technology to locate leaks. As shown below, the inspection of a 10,000-feet (3km) of 36-inch (913mm) diameter Prestressed Concrete Cylinder Pipe (PCCP), gave a clean-bill-of-health with ‘NO LEAKS’ using a leading ...
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Wideband Spherically Focused PVDF Acoustic Sources for Calibration of Ultrasound Hydrophone Probes
Abstract Several broadband sources have been developed for the purpose of calibrating hydrophones. The specific configuration described is intended for the calibration of hydrophones in a frequency range of 1 to 40 MHz. All devices used 25 µm film of PVDF bonded to a matched backing. Two had radii of curvatures (ROC) of 25.4 and 127 mm with f numbers of 3.8 and 19, respectively. Their ...
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KLN Transducer Model Implementation Using Transfer Matrices
The Krinholtz, Leedom, and Matthaei transmission line model for acoustic transducers has been implemented on an IBM PC-XT computer using transfer, or "ABCD" matrices. Use of matrix formalism makes the programs easy to understand and allows quantities such as voltage, stress, strain and current to be readily calculated anywhere in the model. Previously difficult to model cases, such as open ...
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The Design of Broadband and Efficient Acoustic Wave Transducers
Abstract The basic design criteria for SAW transducers is typically a flat frequency response. design criteria for bulk wave transducers in nondestructive evaluation and medical imaging is the compactness of the impulse response. This criteria is different from the usual flat frequency response criteria because a flat bandwidth does not necessarily imply a compact impulse response. Aniterative ...
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Computer-Optimized Design of Quarter-Wave Acoustic Matching and Electrical Matching Networks for Acoustic Transducers
We have developed an Iterative computer program to optimize the parameters for the acoustic matching layer(s) and the electrical matching network of a transducer for a minimum length of the impulse response. By including the Interactions between electrical and acoustic matching in our model » we have been able to significantly improve the quality of our transducers. A 3.65 MHz center ...
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An Edge-Bonded Surface Acoustic Wave Transducer Array
Abstract A new type of transducer array has been designed and built for Imaging surface defect in metals such as aluminum. The array is formed by edge-bonding a piece of piezoelectric material to a substrate of the same material as the sample to be tested. The individual elements in the array are formed by photolithography, and each element acts as an edge-bonded surface wave transducer. The ...
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Fundamental Concepts In Acoustic Transducer Array Design
Abstract Ceramic strip resonators with rectangular cross-section have been made with aspect ratios (width to height ratios) from 0.1 to 30 . The short and open circuit resonant frequencies have been plotted as a function of aspect ratio and show good agreement between experiment and a simple coupled mode theory. The effect of loading these resonators acoustically with solids and liquids has also ...
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Types of Rain and Snow Sensors
Rain and snow sensors are an essential tool used in many industries, from agriculture to transportation. These sensors are designed to measure the amount of precipitation that falls in a given area, allowing individuals and organizations to make informed decisions about how to respond to weather conditions. Types of Rain and Snow Sensors There are several different types of rain and snow ...
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Noise control in building design planning is a sound investment
Jochen Schaal, managing director of SoundPLAN GmbH and Michel Rosmolen, director of SoundPLAN Asia, outline developments in room acoustics to improve our environment Demand for architectural services in India is increasing, with government initiatives like the Smart Cities Mission[i], encouraging development in the sector. This project aims to harness technology to improve urban development, ...
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SL-RAT at Augusta Utilities Division, Georgia - Case Study
As one of the first SL-RAT adopters, Augusta Utilities integrated acoustic technology to address a consent decree by the Georgia Environmental Protection ...
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Working principle and advantages of ultrasonic wind speed and direction sensor
background Ultrasonic wind speed and direction sensor. It is a wind direction measuring instrument developed based on the principle of ultrasound. Use the transmitted sound pulses. Measure the time or frequency difference at the receiving end to calculate the wind speed and direction. It is widely used in the measurement of wind direction and speed in greenhouses, environmental protection, ...
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How to Develop an Effective Hearing Conservation Program
An Easy Guide Our sense of hearing plays an essential role in how we communicate and experience the world, how we stay aware of our surroundings and thus, safe. That’s why, when hearing loss becomes an all-too-common reality, taking its irreversible toll on individuals, businesses, and society, organizations need to step in and take preventive ...
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Smart Parking Sensor Technology - Case Study
Our smart parking sensor technology helps to reduce air pollution and save drivers time. Applying advanced, yet simple to install technology, drivers can be directed to available car parking spaces. The Challenge. Vehicles are a big contributor to carbon emissions and as cities and towns get busier, finding a parking spot can be highly polluting and time consuming. Governments ...
By Vortex
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Minigas – EU-Project - Case Study
Miniaturized photoacoustic gas sensor based on patented interferometric readout and novel photonic integration technologies. A new European consortium, MINIGAS, led by VTT Technical Research Centre of Finland, is developing a miniature gas sensor to detect greenhouse ...
By Gasera Ltd
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James Dunning: Synergizing Innovation in the Water Sector at Syrinix
Bringing innovation to mature water infrastructure systems can be a significant challenge. New regulatory, environmental, and market factors all constrain the ability of water users to institute better and more effective management strategies. Syrinix is a company working to help them by providing products and technologies that can simultaneously address many different water management issues, ...
By Syrinix Ltd
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Industrial Noise - Case Study
The Client Wyeth Nutrition operate a food manufacturing plant in Limerick which manufactures infant nutrition products that are supplied to customers all over the world. The company have an excellent relationship with the local community and source the majority of their supplies from the surrounding area. The team at the plant also work closely with the EPA to ensure that the factory operates at ...
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