Information: - A stopband is a band of frequencies, between specified limits, through which a circuit, such as a filter or telephone circuit, does not allow signals to pass, or the attenuation is above the required stopband attenuation level. Depending on application, the required attenuation within the stopband may typically be a value between 20 and 120 dB higher than the nominal passband attenuation, which often is 0dB. - In radio communications, a radio receiver (commonly also called a radio) is an electronic device that receives radio waves and converts the information carried by them to a usable form. It is used with an antenna. The antenna intercepts radio waves (electromagnetic waves) and converts them to tiny alternating currents which are applied to the receiver, and the receiver extracts the desired information. The receiver uses electronic filters to separate the desired radio frequency signal from all the other signals picked up by the antenna, an electronic amplifier to increase the power of the signal for further processing, and finally recovers the desired information through demodulation. - A mathematician is someone who uses an extensive knowledge of mathematics in his/her work, typically to solve mathematical problems. - In physics, attenuation (in some contexts also called extinction) is the gradual loss in intensity of any kind of flux through a medium. For instance, dark glasses attenuate sunlight, lead attenuates X-rays, and water attenuates both light and sound. - In physics, the wavelength of a sinusoidal wave is the spatial period of the wavethe distance over which the wave's shape repeats, and thus the inverse of the spatial frequency. It is usually determined by considering the distance between consecutive corresponding points of the same phase, such as crests, troughs, or zero crossings and is a characteristic of both traveling waves and standing waves, as well as other spatial wave patterns. Wavelength is commonly designated by the Greek letter "lambda" (). The concept can also be applied to periodic waves of non-sinusoidal shape. The term "wavelength" is also sometimes applied to modulated waves, and to the sinusoidal envelopes of modulated waves or waves formed by interference of several sinusoids. - Wilhelm Cauer (24 June 1900 22 April 1945) was a German mathematician and scientist. He is most noted for his work on the analysis and synthesis of electrical filters and his work marked the beginning of the field of network synthesis. Prior to his work, electronic filter design used techniques which accurately predicted filter behaviour only under unrealistic conditions. This required a certain amount of experience on the part of the designer to choose suitable sections to include in the design. Cauer placed the field on a firm mathematical footing, providing tools that could produce exact solutions to a given specification for the design of an electronic filter. - A passband is the range of frequencies or wavelengths that can pass through a filter. For example, a radio receiver contains a bandpass filter to select the frequency of the desired radio signal out of all the radio waves picked up by its antenna. The passband of a receiver is the range of frequencies it can receive. - A telephone, or phone, is a telecommunications device that permits two or more users to conduct a conversation when they are too far apart to be heard directly. A telephone converts sound, typically and most efficiently the human voice, into electronic signals suitable for transmission via cables or other transmission media over long distances, and replays such signals simultaneously in audible form to its user. - An elliptic filter ( also known as a Cauer filter , named after Wilhelm Cauer , or as a Zolotarev filter , after Yegor Zolotarev ) is a signal processing filter with equalized ripple ( equiripple ) behavior in both the passband and the stopband . The amount of ripple in each band is independently adjustable , and no other filter of equal order can have a faster transition in gain between the passband and the stopband , for the given values of ripple ( whether the ripple is equalized or not ) . Alternatively , one may give up the ability to adjust independently the passband and stopband ripple , and instead design a filter which is maximally insensitive to component variations . As the ripple in the stopband approaches zero , the filter becomes a type I Chebyshev filter . As the ripple in the passband approaches zero , the filter becomes a type II Chebyshev filter and finally , as both ripple values approach zero , the filter becomes a Butterworth filter . The gain of a lowpass elliptic filter as a function of angular frequency is given by : 'elliptic filter' is related to which object entity through the relation of 'subclass of'? Choices: - analysis - antenna - band - concept - conversation - designer - device - distance - electronic filter - experience - field - filter - german - information - knowledge - letter - mathematician - network - out - pass - phone - physics - power - radio receiver - range - scientist - signal - sound - specification - telephone - user - water - wave - work
electronic filter
Ques:Information: - The International Civil Aviation Organization (ICAO) (pronounced OACI), is a specialized agency of the United Nations. It codifies the principles and techniques of international air navigation and fosters the planning and development of international air transport to ensure safe and orderly growth. Its headquarters are located in the "Quartier International" of Montreal, Quebec, Canada. - The airport apron is the area of an airport where aircraft are parked, unloaded or loaded, refueled, or boarded. Although the use of the apron is covered by regulations, such as lighting on vehicles, it is typically more accessible to users than the runway or taxiway. However, the apron is not usually open to the general public and a license may be required to gain access. - The pavement classification number ( PCN ) is an International Civil Aviation Organisation standard used in combination with the aircraft classification number ( ACN ) to indicate the strength of a runway , taxiway or airport apron ( or ramp ) . This helps to ensure that the airport runway , taxiway , and apron ( or ramp ) are not subjected to excessive wear and tear , thus prolonging the usable life of the runway while promoting safe operations of the aircraft landing thereon . - AirPort is the name given to a series of products by Apple Inc. using the (Wi-Fi) protocols (802.11b, 802.11g, 802.11n and 802.11ac). These products comprise a number of wireless routers and wireless cards. The AirPort Extreme name was originally intended to signify the addition of the 802.11g protocol to these products. - According to the International Civil Aviation Organization (ICAO), a runway is a "defined rectangular area on a land aerodrome prepared for the landing and takeoff of aircraft". Runways may be a man-made surface (often asphalt, concrete, or a mixture of both) or a natural surface (grass, dirt, gravel, ice, or salt). 'pavement classification number' is related to which object entity through the relation of 'creator'? Choices: - apple inc . - international civil aviation organization

Ans:
international civil aviation organization