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Muffler (other)
A muffler is a device for reducing the amount of noise emitted by a machine. Muffler may also refer to: *A type of scarf *A silencer fitted to a gun, known as a suppressor Surname *Betty Muffler, Aboriginal Australian artist and healer See also * Muffle * Sound attenuator A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment ... * Ear muff {{dab ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Scarf
A scarf, plural ''scarves'', is a piece of fabric worn around the neck or head for warmth, sun protection, cleanliness, fashion, religious reasons, or used to show the support for a sports club or team. They can be made in a variety of different materials such as wool, linen, silk or cotton. It is a common type of neckwear. History Scarves have been worn since ancient times. In 1350BC Ancient Egypt, Queen Nefertiti is said to have worn a tightly-woven headscarf, and the Statue of Ashurnasirpal II from the 9th century BC features the emperor wearing a shawl. In Ancient Rome, the garment was used to keep clean rather than warm. It was called a focale or ''sudarium'' (sudarium from the Latin for "sweat cloth"), and was used to wipe the sweat from the neck and face in hot weather. They were originally worn by men around their neck or tied to their belt. Historians believe that during the reign of the Chinese Emperor Cheng, scarves made of cloth were used to identify officers ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muffler
A muffler (North American and Australian English) or silencer (British English) is a device for reducing the noise emitted by the exhaust of an internal combustion engine—especially a noise-deadening device forming part of the exhaust system of an automobile. Description Mufflers are installed within the exhaust system of most internal combustion engines. The muffler is engineered as an acoustic device to reduce the loudness of the sound pressure created by the engine by acoustic quieting. The noise of the burning-hot exhaust gas exiting the engine at high speed is abated by a series of passages and chambers lined with roving fiberglass insulation and/or resonating chambers harmonically tuned to cause destructive interference, wherein opposite sound waves cancel each other out. An unavoidable side effect of this noise reduction is the restriction of the exhaust gas flow, which creates back pressure, which can decrease engine efficiency. This is because the engine exha ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Suppressor
A silencer, also known as a sound suppressor, suppressor, or sound moderator, is a muzzle device that reduces the acoustic intensity Sound intensity, also known as acoustic intensity, is defined as the power carried by sound waves per unit area in a direction perpendicular to that area. The SI unit of intensity, which includes sound intensity, is the watt per square meter (W/m2 ... of the muzzle report (sound of a gunshot) and muzzle rise when a gun (firearm or air gun) is discharged, by modulating the speed and pressure of the propellant gas from the muzzle and hence suppressing the muzzle blast. Like other muzzle devices, a silencer can be a detachable accessory mounted to the muzzle, or an integral part of the gun barrel, barrel. A typical silencer is a metallic (usually stainless steel or titanium) cylinder containing internal sound baffles, with a hollow bore to allow the projectile (bullet) to exit normally. During firing, the bullet flies through the bore with litt ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Betty Muffler
Betty Muffler is an Aboriginal Australian artist and ngangkari (healer). She is a senior artist at Iwantja Arts, in Indulkana in Aṉangu Pitjantjatjara Yankunytjatjara (APY Lands), South Australia, known for a series of works on large linen canvases called ''Ngangkari Ngura (Healing Country)''. Early life Muffler was born near Watarru, South Australia, in 1944, of the Pitjantjatjara and Yankunytjatjara peoples. She refers to a place called Yalungu, south of Waturru, as her land, where emus visit a waterhole. She grew up at the Ernabella Mission in Pukatja in the aftermath of the British nuclear tests at Maralinga and Operation Totem at Emu Field in the late 1950s and early 1960s. Seeing the deaths and dislocation caused by the tests has inspired much of her artwork, and she has expressed healing as a recurrent theme in her work. Artistic career Muffler only started to paint late in life, joining the artists at Iwantja Arts in Indulkana. She works in several mediums, notably ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Muffle
A muffle furnace or muffle oven (sometimes retort furnace in historical usage) is a furnace in which the subject material is isolated from the fuel and all of the products of combustion, including gases and flying ash. After the development of high-temperature heating elements and widespread electrification in developed countries, new muffle furnaces quickly moved to electric designs. Modern furnace Today, a muffle furnace is often a front-loading box-type oven or kiln for high-temperature applications such as fusing glass, creating enamel coatings, ceramics and soldering and brazing articles. They are also used in many research facilities, for example by chemists in order to determine what proportion of a sample is non-combustible and non-volatile (i.e., ash). Some models incorporate programmable digital controllers, allowing automatic execution of ramping, soaking, and sintering steps. Also, advances in materials for heating elements, such as molybdenum disilicide, can now pr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sound Attenuator
A sound attenuator, or duct silencer, sound trap, or muffler, is a noise control acoustical treatment of Heating Ventilating and Air-Conditioning (HVAC) ductwork designed to reduce transmission of noise through the ductwork, either from equipment into occupied spaces in a building, or between occupied spaces. In its simplest form, a sound attenuator consists of a baffle within the ductwork. These baffles often contain sound-absorbing materials. The physical dimensions and baffle configuration of sound attenuators are selected to attenuate a specific range of frequencies. Unlike conventional internally-lined ductwork, which is only effective at attenuating mid- and high-frequency noise, sound attenuators can achieve broader band attenuation in relatively short lengths. Certain types of sound attenuators are essentially a Helmholtz resonator used as a passive noise-control device. Configuration Generally, sound attenuators consist of the following elements: * An inner perforat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
