Download or read book Acoustic Absorbers and Diffusers written by Trevor J. Cox and published by CRC Press. This book was released on 2009-01-26 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt: Absorbers and diffusers are two of the main design tools for altering the acoustic conditions of rooms, semi-enclosed spaces and the outdoor environment. Their correct use is important for delivering high quality acoustics. Unique and authoritative, this book decribes how to effectively measure, model, design and apply diffusers and absorbers. It is a resource for new and experienced acousticians, seeking an understanding of the evolution, characteristics and application of modern diffusers. Absorption is a more established technology and so the book blends traditional designs with modern developments. The book covers practical and theoretical aspects of absorbers and diffusers and is well illustrated with examples of installations and case studies. This new edition brings Acoustic Absorbers and Diffusers up-to-date with current research, practice and standards. New developments in measurement, materials, theory and practice since the first edition (published in 2004) are included. The sections on absorbers are extended to include more about noise control.
Download or read book Aroma Dome written by Julie Chertow and published by . This book was released on 2015-10-23 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Introduction to new invention called Aroma Dome and anecdotal stories of the use of essential oils in a 35 year massage practice.
Download or read book Acoustic Absorbers and Diffusers written by Trevor Cox and published by CRC Press. This book was released on 2016-11-18 with total page 577 pages. Available in PDF, EPUB and Kindle. Book excerpt: This definitive guide covers the design and application of absorbers and diffusers in acoustics. Surface diffusion is a relatively young subject area, and diffuser design, application and characterisation are often not well understood. Although there is greater knowledge of absorption, it is also informed by new research. As two of the main design tools for altering the acoustic conditions of rooms, the correct use of absorbers and diffusers is important to the creation of quality acoustics. This text details the evolution and the current state of the art in diffuser and absorber research and application. It covers a range of practical and theoretical aspects, with extensive examples of installations and case studies to cater to practitioners working in the measurement, modelling and design of rooms, semi-enclosed spaces as well as in noise control. It is also invaluable for students and researchers wanting a grounding in acoustic treatment, as well as understanding the latest developments. All chapters have been revised and brought up to date in this new edition, with new applications, absorbers and diffusers featured. Sustainability, portable vocal booths, and fast time domain models for diffusers are just a few of the new sections. Improved techniques for measurement and prediction are included, as well as bringing old methods up-to-date with the latest refinements from standards and research. Most of the prediction methods in the book are now linked to open source implementations and downloadable MATLAB scripts, enabling readers to exploit the knowledge in this book more readily in design and research.
Download or read book Experimental Evaluation of Rocket Exhaust Diffusers for Altitude Simulation written by Joseph N. Sivo and published by . This book was released on 1960 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Essential Oil Diffuser Recipes Book written by Julia Grady and published by . This book was released on 2017-10-06 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: Essential Oil Diffuser Recipes Book includes over 200 diffuser recipes for health, mood, and home. Diffuser recipes for: stress relief, anxiety, depression, cognition, mood enhancement, sleep, nausea, colds and congestion, headache, air fresheners, insect repellent, holidays, seasons, and more.
Download or read book Performance Characteristics of Two 6 and Two 12 Diffusers at High Flow Rates written by William J. Nelson and published by . This book was released on 1949 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Preliminary Investigation of Supersonic Diffusers written by Arthur Kantrowitz and published by . This book was released on 1945 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt: Summary: The deceleration of air from supersonic velocities in channels has been studied. It has become apparent that a normal shock in the diverging part of the diffuser is probably necessary for stable flow, and ways of minimizing the intensity of this shock have been developed. The effect of various geometrical parameters, especially contraction ratio in the entrance region, on the performance of supersonic diffusers has been investigated. By the use of these results, diffusers were designed which, starting without initial boundary layer, recovered 90 percent of the kinetic energy in supersonic air streams up to a Mach number of 1.85.
Download or read book Performance Characteristics of Plane wall Two dimensional Diffusers written by Elliott G. Reid and published by . This book was released on 1953 with total page 90 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experiments have been made at Stanford University to determine the performance characteristics of plane-wall, two-dimensional diffusers which were so proportioned as to insure reasonable approximation of two-dimensional flow.
Download or read book Performance Evaluation of Fixed and Variable area Rocket Exhaust Diffusers Using Single and Clustered Nozzles with and Without Gimbaling written by Bruce E. Church and published by . This book was released on 1962 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book An Experimental Investigation of Two Large Annular Diffusers with Swirling and Distorted Inflow written by and published by . This book was released on 1980 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Phenomena in Supersonic Diffusers written by Heinrich Ramm and published by . This book was released on 1947 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Effect of Diffusers Shrouds and Mass Injection on the Starting and Operating Characteristics of a Mach 5 Free Jet Tunnel written by John K. Molloy and published by . This book was released on 1971 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Investigation of Three Types of Supersonic Diffuser Over a Range of Mach Numbers from 1 75 to 2 74 written by L. Eugene Baughman and published by . This book was released on 1951 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation was conducted in the Lewis 4- by 4-inch variable Mach number tunnel to determine off-design internal performance of three types of supersonic diffuser. Results were obtained at Mach numbers ranging from 1.75 to 2.74 with a normal-shock diffuser, two single-shock spike diffusers designed for Mach numbers 1.75 and 2.40, respectively, and tree convergent-divergent perforated diffusers designed for Mach numbers 1.75, 2.10, and 2.50, respectively. The variation of total-pressure recovery with relative mass flow was determined at various Mach numbers in the range. A thrust coefficient based on these measurements was utilized to facilitate interpretation of the results.
Download or read book Complete Essential Oil Diffuser Recipes written by Pam Farley and published by Simon and Schuster. This book was released on 2020-06-09 with total page 167 pages. Available in PDF, EPUB and Kindle. Book excerpt: Craft Your Own Essential Oil Blends! Do you pine for a clean, fresh-smelling home without the dangerous chemicals found in traditional “air-freshening” products? Do you want to feel the blissful escape as aromatic scents permeate the air in your workspace? Complete Essential Oil Diffuser Recipes will teach you how to combine, use, and diffuse essential oils so that you can scent your home or workspace and create a peaceful and immersing ambiance. Within this book, you’ll find descriptions of different oil diffusers that will help you decide which product will help you embark on your journey to serenity. Following these descriptions are more than 150 recipes to create scents that assist you in cultivating mental clarity, relaxation, and sleep, as well provide you with immune support, stress relief, mood enhancement, romantic atmosphere, and much more! Fifty beautiful color photographs accompany the recipes, providing readers with stunning visuals to aid the book’s instruction. These recipes include: Wake Me Up Mama's Little Helper Freshly Focused Nature's Bliss Margarita Sunrise Forest Staycation Respiratory Relief Love Potion Man Cave Hibernate No More Sniffles Mountain Rain Stress Less Pillow Talk So Many More! These recipes can be used with any brand of essential oil. Start experiencing all of the amazing benefits that aromatherapy has to offer today!
Download or read book Fundamentals of Jet Propulsion with Applications written by Ronald D. Flack and published by Cambridge University Press. This book was released on 2005-04-25 with total page 696 pages. Available in PDF, EPUB and Kindle. Book excerpt: This introductory 2005 text on air-breathing jet propulsion focuses on the basic operating principles of jet engines and gas turbines. Previous coursework in fluid mechanics and thermodynamics is elucidated and applied to help the student understand and predict the characteristics of engine components and various types of engines and power gas turbines. Numerous examples help the reader appreciate the methods and differing, representative physical parameters. A capstone chapter integrates the text material into a portion of the book devoted to system matching and analysis so that engine performance can be predicted for both on- and off-design conditions. The book is designed for advanced undergraduate and first-year graduate students in aerospace and mechanical engineering. A basic understanding of fluid dynamics and thermodynamics is presumed. Although aircraft propulsion is the focus, the material can also be used to study ground- and marine-based gas turbines and turbomachinery and some advanced topics in compressors and turbines.
Download or read book Survey and Evaluation of Fine Bubble Dome Diffuser Aeration Equipment written by Daniel H. Houck and published by . This book was released on 1981 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Friction Coefficients in a Vaneless Diffuser written by W. Byron Brown and published by . This book was released on 1947 with total page 522 pages. Available in PDF, EPUB and Kindle. Book excerpt: Friction coefficients for three constant-area vaneless diffusers, used in conjunction with a centrifugal impeller, were determined from static- and total-pressure surveys taken at several radii and from the usual over-all measurements of temperature, pressure, and air flow. The average value of the friction coefficient through the entire diffuser was approximately 50 percent higher than that for fully developed turbulent flow in smooth pipes. Friction coefficients at the diffuser entrance were about three times the pipe values. In the middle of the diffuser, the friction coefficients agreed well with smooth-pipe values.
