Is it an indoor or outdoor measurement? Outdoor sound will dissipate more than indoor noise, which reverberate.įor the sound measurement to be useful, the conditions under which the reading is taken and the distance from the source must be reported.The direction the noise is facing relative to the meter.The distance between the meter and the source of the measured sound.Noise levels is measured by a sound level meter using the decibel scale. Table 1 lists the common sounds that are heard: Every increase of 3 dB represents a doubling of sound intensity or acoustic power. The decibel scale starts 0, the softest sound a human can detect, and increases in multiples of 10 dB. The intensity of the noise emitted from air conditioning units, for example, is the force of the sound wave (amplitude) and is measured in decibels (‘dB’). Sound energy travels in waves and is measured in frequency and amplitude. The logarithmic scale that measures sound and loudness is called a decibel. We use the term ‘noise’ to indicate unwanted sound. Vibrations that are detected by the human ear are classified as sound. Noise and vibration are both fluctuations in the pressure of air (or other media) which affect the human body. Without proper ear protection, this can lead to profound hearing loss, which affects the quality of life of us, our friends, and our family. Most of us live and work in loud environments. This article describes Occupational Safety and Health Administration (OSHA), their recommended occupational noise limits, penalties for not complying, and products that are designed to reduce noise so that the factory environment can comply with OSHA recommendations. It is important to understand how noise is measured and the strategies that can be used to reduce noise in your factory environment. Different types of air conditioners emit different noise levels and are noisier as they age. The efficiency of a type of cooler is a primary concern, but so is the noise level. Air conditioning and cooling technology has become more advanced as individual, industrial, and manufacturing demands have increased at the same rate. “What does dBA mean when someone talks about noise levels?”Ĭompressed air exhaust produces noise whether from cylinders, solenoid valves, or from blow off nozzles. Magnetic Bases for Blowoff and Cooling Products.Hose for In Line Vacuum Units (Ring Vacs).Hose Kit for Vortex Tubes, Tool Coolers and Adjustable Coolers.Coupling Kit for air knives (Air Blades).Mounting Systems for Air Knives and Air Amplifiers.Brackets for In Line Vacuum Units (Ring Vacs).Temperature Sensing Labels for Panel Coolers.

Stainless Steel Shim Kits for Blowoff Products.Electronic Thermostatic Control for Panel Coolers.Thermostat and Solenoid Valve Kit for Panel Coolers.Point of Use Zero Cartridge Pneumatic Separators.Mounting Brackets for Filters and Regulators.Compressed Air Operated Conveying, Venting & Specialty Cleaning.Extra Quiet Cabinet Enclosure Coolers (Panel Coolers).Cabinet Enclosure Coolers (Panel Coolers).Vortex Tube And Industrial Spot Cooling.Several comments and comprehensive bibliographical references are also provided for each drawn page to enlarge the range of subjects or exercises that can be discussed in courses and foster further readings. Seven drawn pages constitute a visual support to explain the origin and history of the decibel, together with examples from acoustics and other domains on the use of logarithmic scales and classical decibel calculations. This paper is an example of how educational comics can be designed and used to introduce one of the most commonly discussed topics when the basics of acoustics are taught: decibel level. While they are valuable resources for researchers, these books might appear a little daunting for a young audience or for people who are new to acoustics.

In fact, the fields of acoustics cover an especially broad range of subjects and domains, and comprehensive acoustics textbooks are usually quite thick as a consequence. Acoustics is generally defined as the science that deals with the production, transmission, and reception of sound and the understanding and control of its effects.

Decibel noise scale