sympathetic resonance

sympathetic resonance
A harmonic beat that develops when the natural vibration frequency of one mechanism is in phase with a vibration of another mechanism that is somehow coupled. In helicopters, the rotor system has its own vibration-resonant frequency that amplifies the same frequency in another part of the helicopter. This phenomenon generally is controlled by a design feature of gear boxes and other means of damping harmonic vibrations.

Aviation dictionary. 2014.

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  • Sympathetic resonance — is a harmonic phenomenon wherein a formerly passive string or vibratory body responds to external vibrations to which it has a harmonic likeness. The classic example is demonstrated with two similar tuning forks of which one is mounted on a… …   Wikipedia

  • Sympathetic string — Sympathetic strings or resonance strings are auxiliary strings found on many Indian musical instruments, as well as some Western Baroque instruments and a variety of folk instruments. They are typically not played directly by the performer… …   Wikipedia

  • resonance — The energetic vibration of a body produced by application of a periodic force of nearly the same frequency as that of the free vibration of the affected body. It is the condition of two bodies adjusted to have the same frequency of vibration.… …   Aviation dictionary

  • resonance — [rez′ə nəns] n. [LME resonnaunce < MFr resonance < L resonantia, an echo] 1. the quality or state of being resonant 2. reinforcement and prolongation of a sound or musical tone by reflection or by sympathetic vibration of other bodies 3. a) …   English World dictionary

  • resonance theory — n 1) a theory of hearing: different sections of the basilar membrane of the organ of Corti are tuned to different vibration rates and set up sympathetic vibrations that stimulate sensory nerve endings when the cochlear endolymph is vibrating at a …   Medical dictionary

  • Resonance — This article is about resonance in physics. For other uses, see Resonance (disambiguation). Resonant redirects here. For the phonological term, see Sonorant. Increase of amplitude as damping decreases and frequency approaches resonant frequency… …   Wikipedia

  • sympathetic — adj. & n. adj. 1 of, showing, or expressing sympathy. 2 due to sympathy. 3 likeable or capable of evoking sympathy. 4 (of a person) friendly and cooperative. 5 (foll. by to) inclined to favour (a proposal etc.) (was most sympathetic to the idea) …   Useful english dictionary

  • sympathetic — /sɪmpəˈθɛtɪk / (say simpuh thetik) adjective 1. characterised by, proceeding from, exhibiting, or feeling sympathy; sympathising; compassionate. 2. acting or affected by, of the nature of, or relating to a special natural sympathy or affinity;… …  

  • resonance — 1. Sympathetic or forced vibration of air in the cavities above, below, in front of, or behind a source of sound; in speech, modification of the quality ( e.g., harmonics) of a tone by the passage of air through the chambers of the nose, pharynx …   Medical dictionary

  • resonance — res•o•nance [[t]ˈrɛz ə nəns[/t]] n. 1) the state or quality of being resonant 2) the prolongation of sound by reflection; reverberation 3) phn a) amplification of a source of speech sounds, esp. of phonation, by sympathetic vibration of the air,… …   From formal English to slang

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