| anechoic chamber |
An acoustic space without echo or reverberation. Often used for the acoustic testing of microphones and loudspeakers.
출처: www.kareoke.com/glossary/microphone_glossary_of_te...
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| anechoic |
An object or area characterized by an unusually low degree of reverberation; echo-free. An anechoic target often appears to be missing in data. Rubber tires and soft wood often sound absorbing using certain frequencies. These echo-free targets are often recognized by the "hole" they leave in the normal background sonar returns. Anechoic chambers and pools are used to test acoutiscal systems in the laboratory.
출처: www.instituteformarineacoustics.org/SonarPrimer/da...
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| anechoic room |
Test room whose surfaces absorb essentially all of the incident sound energy over the frequency range of interest, thereby affording nearly free-field conditions over the measurement surface.
출처: users.aol.com/inceusa/glossary.html
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| anechoic |
Neither having nor producing an echo angle of attack. The acute angle of attack between the chord of an airfoil and its direction of motion relative to the air, often referred to as "alpha"; when an airfoil's exceeds the one that provides maximum lift, it goes into a stall, losing air speed and, potentially, the capability of the pilot to control the airplane.
출처: www.hq.nasa.gov/office/pao/History/presrep95/aa.ht...
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| anecdotal records |
An informal, written record (usually positive in tone), based on the observations of the teacher, of a student's progress and/or activities which occur throughout the day.
출처: www.educationoasis.com/curriculum/Reading/glossary...
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