The Noise Control Act is a United States federal law that was enacted in 1972 to address and mitigate noise pollution. The primary objectives of the Act are to establish a comprehensive national policy to promote an environment free from noise that jeopardizes health and welfare and to empower federal and state agencies to regulate noise emissions that can affect the public.

A silent disco is a unique dance party concept where attendees listen to music through wireless headphones instead of a traditional sound system. At a silent disco, multiple DJs can play different music simultaneously, allowing participants to choose their preferred channel and switch between them as they wish. This creates an individual listening experience while still fostering a communal atmosphere. Key features of a silent disco include: 1. **Headphones**: Guests wear wireless headphones equipped with adjustable volume controls and the option to switch between different music channels.

"The Hum" typically refers to a mysterious and persistent low-frequency noise that has been reported in various locations around the world. Those who hear it describe it as a low rumbling sound, similar to a distant engine or industrial noise. The phenomenon is often associated with a range of experiences—for some, it can be annoying or even debilitating, while others may not hear it at all.

Noise Free America is a nonprofit organization that advocates for reducing noise pollution and promoting sound management in communities across the United States. It aims to raise awareness about the negative effects of excessive noise on health, well-being, and quality of life. The organization works to promote policies, regulations, and community actions that help to mitigate noise pollution, such as stricter noise ordinances and public education campaigns about the importance of reducing noise in residential areas, schools, parks, and other public spaces.

Noise regulation refers to laws, standards, and guidelines established by government agencies or local authorities to control and manage noise pollution. These regulations are typically aimed at minimizing the adverse effects of noise on public health, quality of life, and the environment. Noise pollution can originate from various sources, including traffic, industrial activities, construction, urban development, and entertainment venues.

The curie (symbol: Ci) is a unit of radioactivity that was originally defined as the amount of radioactivity in a sample of radium-226 that produces 37 billion disintegrations per second. It is named after Marie Curie and her husband Pierre Curie, who conducted pioneering research on radioactivity. In terms of the International System of Units (SI), 1 curie is equivalent to 3.

The Fresnel (symbol: F) is a unit of measurement used in optics to express the amount of light reflected or transmitted at an optical boundary, such as the interface between two media with different refractive indices. More specifically, it is often associated with the Fresnel equations, which describe how light behaves when it encounters an interface between two different media, providing the reflection and transmission coefficients for the light wave.

Traffic noise refers to the sound generated by vehicles on roads, highways, and streets. This type of noise is typically characterized by a combination of sounds from various vehicles, including cars, trucks, buses, and motorcycles. The intensity and characteristics of traffic noise can vary depending on several factors, including: 1. **Types of Vehicles**: Different vehicles produce varying levels of noise, with larger vehicles like trucks and buses generally being louder than smaller cars.

The Working Environment (Air Pollution, Noise and Vibration) Convention, 1977, also known as ILO Convention No. 148, is a treaty established by the International Labour Organization (ILO) aimed at protecting workers' health and safety in relation to environmental hazards in the workplace. 1. **Objective**: The convention addresses the need to ensure that environments in which people work are safe and healthy.

As of my last knowledge update in October 2023, "Thermie" could refer to various concepts depending on the context. Here are a few possible interpretations: 1. **Thermal Energy**: It could be a colloquial term related to thermal energy, which is the energy that comes from heat. This could also relate to temperature measurement or heat transfer processes in various scientific or engineering fields.

Laser ultrasonics is a non-destructive testing (NDT) technique that utilizes laser technology to generate and detect ultrasonic waves in various materials. This method combines the principles of ultrasonics (which involves the use of high-frequency sound waves) with laser technology to analyze the properties and integrity of materials without causing any damage. ### Key Components of Laser Ultrasonics: 1. **Laser Generation**: A high-energy laser beam is focused onto the surface of the material being tested.

A billion cubic meters (bcm) of natural gas is a unit of measurement that quantifies the volume of natural gas. Specifically, it refers to an amount of natural gas that measures one billion cubic meters. This unit is often used in the energy industry to report production, consumption, and reserves of natural gas on a national or international scale. To put this into perspective, the energy content of natural gas can also be expressed in terms of energy units.

The Brewster (symbol: Br) is a unit of measure for the angle of incidence at which light with a particular polarization is perfectly transmitted through a transparent dielectric surface, with no reflection. This angle is known as Brewster's angle.

A calorie is a unit of measurement for energy. It is commonly used to quantify the amount of energy that foods provide when consumed, as well as the energy expenditure of physical activities. In dietary contexts, calories are often expressed as kilocalories (kcal), where one kilocalorie is equivalent to 1,000 small calories (cal). For example, when people refer to a food item containing 200 calories, they are typically referring to 200 kilocalories.

The Roentgen (symbol: R) is a unit of measurement for ionizing radiation exposure, specifically in air. It quantifies the amount of ionization produced in a specified volume of air by X-rays or gamma rays. The unit is named after Wilhelm Conrad Roentgen, the discoverer of X-rays. One Roentgen is defined as the amount of radiation that produces 2.

The grave (symbol: "gr") is a non-SI metric unit of mass that is equal to one kilogram. It is specifically used in the context of measuring the mass of a substance based on its volume, especially in the fields of physics and engineering. The grave is not commonly used in daily life or in scientific literature today, having been largely replaced by the kilogram as the standard unit of mass. The use of the grave may sometimes still be encountered in certain regional practices or historical contexts.

The term "gravitational metric system" is not widely recognized in standard scientific literature, and it may refer to a couple of different concepts. However, it's possible that you are referring to the gravitational metric used in the context of General Relativity, or perhaps to a metric system that quantifies mass or weight under the influence of gravity.

The Federal Institute for Materials Research and Testing (BAM, Bundesanstalt für Materialforschung und -prüfung) is a German research institution that focuses on materials science, materials testing, and quality assurance. Established in 1871 and located in Berlin, BAM operates under the jurisdiction of the German Federal Ministry for Economic Affairs and Energy.

Giatec Scientific is a technology company that specializes in developing innovative solutions for the construction and materials testing industries. Primarily, the company focuses on advancing concrete testing and monitoring through the use of smart technologies. Giatec is well-known for its flagship products, including the Smart Concrete Sensor and the Giatec iCOR, which assist engineers and construction professionals in assessing the health and durability of concrete structures in real-time.

Kilometres per hour (km/h) is a unit of measurement used to express speed or velocity. It indicates how many kilometers are traveled in one hour. For example, if a vehicle is moving at a speed of 60 km/h, it means that it will cover 60 kilometers in one hour if it maintains that speed. This unit is commonly used in many countries around the world, particularly for road traffic speeds.