Baffles Cooling System (Homepage) Welcome Baffles Cooling System is a dedicated manufacturing, designing, engineering and supplying firm of Industrial Noise Controllers such as Silencers and Acoustic Enclosures, Cooling Towers and Heat Exchangers. We have been certified by the ISO 9001:2008 organisation for our international product standards and the Total Quality Management System that we follow. Our products cater to a wide canvas of industries and is widely supplied to the Indian subcontinent and Middle East Counties. Product Range We bring forth an astounding range of precisely engineered industrial tools and equipments like Silencers, Acoustic Enclosures, Cooling Towers and Heat Exchangers. All these products are made up of quality raw materials, let it be Plate, Sheet or Flange, and are highly durable, efficient and effective. The products are offered in the specific dimensional accuracy as per the requirements of the clients in the shortest span of time at most competitive prices. (Profile) About Us: Backed by our passion and vast experience in the industry, Baffles Cooling Systems was incorporated in the year 2013 at Coimbatore, Tamil Nadu (India). The team of BCS is driven by the mission and vision of the company to provide the highest quality and reliable products to the customers in the shortest span of time. We are backed by our superior infrastructure and the skilled group of professionals in achieving its goals. Following are some of the notable facts about the company: Based in Coimbatore, Tamil Nadu (India) Incepted in the year 2013 Designer, engineer, manufacturer and exporters of Industrial Silencer, Acoustic Enclosure, Cooling Towers and Heat Exchangers ISO 9001:2008 certified for Total Quality Manageme... ... middle of paper ... ...s of the cycle. Wave length (m) = Speed of sound / Frequency Frequency – It is the number of cycles per second. its unit is Hertz. Noise – The unwanted sound is called as noise. Decibel (dB)- Decibel is a logarithmic unit used to describe the ratio of the signal power level, sound pressure, etc. Decibel (dBA) - Sound pressure is not sensed equally by the human ear at different frequencies. To compensate, sound meters are normally fitted with filters adapting the measured sound response to the human sense of sound. The most commonly used filter is A-weighting filter. These filter weightings are related to human response to pure tone sounds (dBA). Sound power level (SWL) – It is the actual sound energy emitted by the sound source. It is not affected by the environment. It can not be measured directly and is calculated from sound pressure level measurement .
The unit used to measure the intensity of sound is called the decibel(dB). Sounds that measure up to 75dB are considered to be in the "safe zone". Constant exposure to to sound at these levels are very unlikely to cause any lasting damage to long term hearing. The sound of regular volume conversation measures at around 60dB and the sound of a running dishwasher measures at roughly 75dB. Sounds around the 85dB level are considered a moderate risk to hearing. Exposure at these levels for extened periods of time may lead to some form of damage causing NIHL. Sounds at these levels include heavy traffic and crowded areas at 85dB, active subway stations at 95dB and listening to an mp3 player with ear buds at maximum volume at 105dB in which listening for just 15 minutes can cause permanent damage. Sound at 120dB and above are in the "danger zone". This level of sound is to be avoided at all cost as exposure even for a short pulse will lead to immediate permanent damage. This level includes the sound of ambulance sirens at 120dB, a jet taking off at 140dB and gunshots at 165 dB and above. (Rabinowitz,
Despite the increased emphasis on the need for noise reduction, studies published in the past five years found that sound levels in the ICU continue to exceed the WHO noise recommendations.3, 5-10 To interpret research on noise in the hospital, it is important to have an understanding of the terminology used (Table 1.) Noise is simply unwanted sound. What is noise to one individual may not be to another. Sound levels are reported in decibels (dB), with 0 dB being the threshold for human hearing. A 3 dB change in sound level is just discernible, a 5 dB change is discernible and a 10 dB change is perceived as a doubling or halving of the sound level....
Many people use spray foam insulation to decrease energy costs in homes and commercial buildings. Adding or increasing the insulation in an existing structure can save hundreds of dollars a year in heating and air conditioning bills. Another reason to insulate that is not often considered is to control noise. Insulation in the walls and ceiling can act as a muffler or sound barrier to noise produced by heating and air conditioning units, phones, piping, appliances and radios. A quieter workplace is much nicer to work in than a noisy one. Studies show that quiet conditions increase a worker's efficiency.
For most careers, sound is used as a medium for communicating thoughts, ideas, and important information. For this very reason, it is unlikely that you would ever see an office space with tall ceilings and hardwood floor—as people would be unable to clearly communicate with each other due to the echoic effects of the architectural structure. Instead, office spaces have relatively low ceilings and carpeted floor to reduce the number of reflections from a sound source. This allows our voices to be heard clearly for the intended audience—whether a cubicle neighbor, or a group of people in a conference room. However, a large number of industrial workplaces produce sound pollution as a result of machinery. For these particular environments, sound absorption and isolation techniques are used to reduce noise pollution and create safer aural environments for employees. With this concept of utilizing sound and disposing sound, we can take a closer look at a career in music production—a job that meticulously considers every aspect of sound. While the engineers that produce ‘billboard albums’ rely greatly on their choice of equipment and their ears, the environment in which they record, mix and master plays a tremendous role in the clarity and the overall soundscape.
Sound is a type of longitudinal wave that originates as the vibration of a medium (such as a person’s vocal cords or a guitar string) and travels through gases, liquids, and elastic solids as variations of pressure and density. The loudness of a sound perceived by the ear depends on the amplitude of the sound wave and is measured in decibel, while its pitch depends on it frequency measured in hertz, (Shipman-Wilson-Higgins, 2013).
The thermal performance of a heat exchanger depends upon various parameters like inlet temperature of a hot fluid, type of hot fluid, type of cold fluid, shape of baffles, material of baffles, baffles angle and property of ribs. Basically fluid flow and heat transfer characteristics are largely depends upon the Reynolds number (Re). Reynolds number is basically the ratio of inertia force to viscous force. Re is only the factor by which we can decide whether the fluid is laminar or turbulent in shell and tube type of heat exchanger. Heat exchanger is an adiabatic device in which heat is transferred from one fluid to another fluid across a plate surface. In this paper we have introduced some special type of triangular baffles with rectangular channels. The purpose
The sonar gives out a 235 decibel pressure waves of pinging and metallic shrieking. At 200 Db, the vibrations can rupture your lungs, and above 210 Db the noise can go straight through your brain until it hemorrhages. Even being 300 miles away the source of the sonar, these waves can retain an intensity of 140 Db, a hundred times more intense than the level known to alter the behavior of large whales. In addition to animal strandings, biologists are concerned that marine mammals can suffer persistent stress from changes in diving, feeding and
Amplitude is the amount of energy that is carried by the wave. In music, the energy is expressed in volume. The amplitude directly affects the volume of the note that is being played. The higher the amplitude, the more energy being carried, the louder the note that is being played. The lower the amplitude, the less energy being carried, the lower the volume of the note being played. The most commonly used unit of measurement for amplitude is the decibel.
as Hertz (Hz). The sounds of speech are in the range of 250 Hz to 4000
Thermoacoustics in the broadest sense is the phenomenon in which either sound is generated by a heated surface, or heat is moved from one place to another by sound. The thermoacoustic effect of which our project will take advantage is the latter of the two. Put simply, a thermoacoustic refrigerator creates a temperature gradient across a stack as a by product of induced resonance within a tube. The
In acoustical problems the sound intensity is expressed by another convenient unit called decibel (dB) which 1/10 of bel unit.
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Acoustic waves have multiple equations, but this version is the simplified form. In a simplified acoustic wave equation there is only one spatial dimension. In other more complex equations there is a possibility of two or maybe even three dimensions. [5] The letter “p” in the general form equation pictured above is to show the acoustic pressure . The letter “c” represents the speed of sound. Both acoustic pressure and speed of sound are the key ingredients to describing the behavior of sound in matter.
From Kiss screaming “I Love it Loud, I wanna hear it loud,” to the Black Eyed Peas belting out “play it loud, baby play it loud,” loud music has spanned generations. For most people it is always been seen simply as fun entertainment. However as time goes on it is becoming more and more obvious just how dangerous “playing it loud” actually is. Musicians, music venue workers, DJs, and now even people listening to a personal music players, such as an iPod are in danger. Since music is such a large part of American culture, our society should educate those at risk on music-induced hearing loss so that music can continue to be enjoyed throughout life. Listening to loud music for an extended amount of time presents the risk of music-induced hearing loss or the loss of sensitivity to sound because of overexposure to loud music. With music overexposure and music-induced hearing loss it is important to realize the risks for musicians, other people in the music business, and people listening to portable music players (PMPs) and start looking for ways to protect and prevent music-induced hearing loss.
Sources for this paper have been literature, the Annual Report 2003, further Bosch publications and internet sources.