A comprehensive discussion of the theory of principles and concept of noise control. The authors provide a range of practical applications of current noise-control technology. The book provides a sound base to understanding and solving real-life problems. It contains a large bibliography and comprehensive glossaries to make the information easily accessible.
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Preface. Acknowledgements. Fundamentals and basic terminology. The human ear. Instrumentation for noise measurement and analysis. Criteria. Sound sources and outdoor sound propagation. Sound power, its use and measurement. Sound in enclosed spaces. Acoustic enclosures and barriers. Barriers. Pipe lagging. Muffling devices. Vibration control. Sound power and sound pressure level estimation procedures. Active control of noise. Survey of analytical techniques for the estimation of sound power levels. Appendix 4: Absorption coefficients based upon impedance tube measurements. Appendix 5: Porous liners. Appendix 6: Frequency analysis. List of standards. References. Glossary of symbols. Index.
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Descrizione libro CRC Press, 1996. Paperback. Condizione libro: New. 2. Codice libro della libreria DADAX041920430X
Descrizione libro CRC Press, 1995. Paperback. Condizione libro: New. Codice libro della libreria P11041920430X
Descrizione libro CRC Press, 1995. Condizione libro: New. Brand New, Unread Copy in Perfect Condition. A+ Customer Service! Summary: Preface. Acknowledgements. Fundamentals and basic technology. Introduction. Noise control strategies: Existing installations; Installations, facilities and products in the design stage; Airborne vs structure-borne noise. The acoustic field variables and wave equation: variables; The acoustic field; Magnitudes; The speed of sound; Dispersion; Acoustic potential function and the wave equation. Plane and spherical waves: Plane wave propagation; Spherical wave propagation. Mean square quantities. Sound intensity: Plane wave and far field intensity; Spherical wave intensity; sound power. Units. Spectra: frequency analysis; A convenient property of one-third actave ban center frequencies. Combining sound pressures: Addition of coherent sound pressures; Addition of incoherent sound pressures (logarithmic addition); Subtraction of sound pressure levels; Combining level reductions. Impedance: Mechanical impedance; Specific acoustic impedance; Acoustic impedance. Flow Resistance. The human ear. Brief description of the ear: External ear; Middle ear; Inner ear; Cochlear duct, or partition of the inner ear. Subjective response to sound pressure level: Loudness; Loudness level in phons; Comparative loudness and the sone. Pitch. Masking. Instrumentation for noise measurement and analysis. Microphnes: Condenser microphone; Piezo-electrical microphone; Pressure response; Microphone sensitivity; Field effecs and calibration. Weighting networks. Sound level meters. Grades of sound level meter. Sound level meter calibration: Electrical Calibration; Acoustic calibration. Noise measurements using sound level meters: Microphone mishandling; Sound level meter amplifier mishandling; Microphone and sound level meter response characteristics; Background noise; Wind noise; Temperature; Humidity and dust; Reflections from nearby surfaces. Time- varying sound. Noise level management. Statistical analyzers. Noise dosemeters. Tape recording of noise. Spectrum analyzers. Intenisty meter: Sound intensity by p-u method; Sound intensity by p-p method; Frequency decomposition of intensity. Criteria. Introductions. Hearing loss: Threshold shift; Presbycusis; Hearing damage. Hearing damage risk: Requirements for speech recognition; Quantifying hearing damage risk; International standards organization formulation; Alternative formulations; Observed hearing loss; Some alternative interpretations. Hearing damage risk criteria: Continuous noise; Impulsive noise; Impact noise. Speech interference criteria: broadband background noise; Intense tones. Psychological effect of noise: Noise as a cause of stress; Effect and behaviour of work efficiency. Ambient noise level specification: Noise weighting curves; Comparison of specifications; Speech privacy. Community noise level criteria: A-weighting criteria; Noise rating criteria. Sound sources. Introduction. Simple source: Pulsating sphere; Fluid mechanical monopole source. Dipole source: Pulsating doublet (far-field approximation); Vibrating sphere; Fluid mechanical dipole source. Quadrupole source (far-field approximation): Lateral quadropole; Longitudinal quadropole; Fluid mechanical quadrupole source. Line source: Infinite line source; Finite line source. Prison in an infinite baffle: Far field; Near field on axis; Radiation load of the near field. Incoherent plane radiator: Single wall; Several walls of a building or enclosure. Directivity. Reflection effects: Simple source near a reflecting surface; Source near a reflecting surface; Observer near a reflecting surface; Observer and source both close to a reflecting surface. Reflection and transmission at a plane two media interface: Porous earth; Plane wave reflection and transmission; Spherical wave reflection at a plane interface; Effects of turbulance. Sound propogation outdoors: Review of methodology; Limits to accuracy of prediction; Forecasting schemes; Geometrical spreading; Directivity f. Codice libro della libreria ABE_book_new_041920430X
Descrizione libro CRC Press. PAPERBACK. Condizione libro: New. 041920430X New Condition. Codice libro della libreria NEW4.0943914