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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Capstone Model C30 Acoustic Emissions MASKING Making is the action of bringing one sound (audible when heard alone) to inaudibility or to unintelligibility by the introduction of another sound. It is most marked when the masked sound is of higher frequency than the masking sound. MASKING NOISE A noise that is intense enough to render inaudible or unintelligible another sound that is simultaneously present. MEDIUM Medium is a substance carrying a sound wave. MICROBAR A Microbar is a unit of pressure, equal to 1 dyne per square centimeter. MICROPHONE An electro-acoustic transducer that responds to sound waves and delivers essentially equivalent electric waves. NODE A point, line, or surface a wave has zero amplitude. NOISE Noise is any sound that is undesirable because it interferes with speech and hearing, or is intense enough to damage hearing, or is otherwise annoying. NOISE LEVEL Refer to sound level. OCTAVE An Octave is the interval between two sounds having a basic frequency ratio of two. For example, there, are 8 octaves on the keyboard of a standard piano. OCTAVE BAND All of the components, in a sound spectrum, whose frequencies are between two sine wave components separated by an octave. OCTAVE-BAND SOUND PRESSURE LEVEL The integrated sound pressure level of only those sine-wave components in a specified octave band, for a noise or sound having a wide spectrum. OSCILLATION The variation with time, alternately increasing and decreasing, (a) of some feature of an audible sound, such as the pressure, or (b) of some feature of a vibrating solid object, such as the displacement of its surface. PARTIAL NODE A Partial Node is the point, line, or surface in a standing wave system where there is a minimum amplitude differing from zero. 410025-001 Rev A (September 2002) Page 32 of 36 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Guide for Capstone Turbine Model Number
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