Theory and Design for Mechanical Measurements
6th Edition
ISBN: 9781118881279
Author: Richard S. Figliola, Donald E. Beasley
Publisher: WILEY
expand_more
expand_more
format_list_bulleted
Textbook Question
Chapter 9, Problem 9.40P
What is the sound pressure in pascals if the measured sound level is reported as 60.0 dB(A) at the octave band of 62.5 Hz?
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
Four identical compressors are tested in an anechoic chamber with some
background noise. A sound pressure level (SPL) meter is placed at a fixed location in the
chamber. The measured SPL is 85.0 dB when all compressors are switched on. When half
of the compressors are shut down, the SPL measured at the same location is 82.3 dB.
Assuming all sound sources are uncorrelated, what is the SPL of the background noise at
this location?
Cliff height. You are climbing in the high Sierra where you suddenly find
yourself at the edge of a fog-shrouded cliff. To find the height of this
cliff, you drop a rock from the top and 10 s later hear the sound of it
hitting the ground at the foot of the cliff. Ignoring air resistance, how
high is the cliff if the speed of the sound is 330 m/s?
What should be the surface tension of a liquid if its density, which is 1.44
g/cc, is the same as that of the calibrating liquid? The displacements of
the liquid and the calibrating liquid inside the capillary tube are both 0.5
cm. The surface tension of the calibrating liquid is 29.4509 dynes/cm.
Chapter 9 Solutions
Theory and Design for Mechanical Measurements
Ch. 9 - Prob. 9.1PCh. 9 - 9.2 State the following pressures as absolute...Ch. 9 - A water-filled manometer is used to measure the...Ch. 9 - Prob. 9.4PCh. 9 - 9.5 The pressure differential across an orifice...Ch. 9 - Show that the static sensitivity of an inclined...Ch. 9 - Prob. 9.7PCh. 9 - Show that the instrument (systematic) uncertainty...Ch. 9 - A strain gauge, diaphragm pressure transducer...Ch. 9 - Select a practical fluid to use in a manometer to...
Ch. 9 - An air pressure over the 200- to 400-N/m2 range is...Ch. 9 - Calculate the design-stage uncertainty in...Ch. 9 - The pressure drop across a valve through which air...Ch. 9 - Estimate the sensitivity (pF/mm) of a capacitance...Ch. 9 - A diaphragm pressure transducer is calibrated...Ch. 9 - A diaphragm pressure transducer is coupled with a...Ch. 9 - Prob. 9.17PCh. 9 - A 2.0 mm thick circular steel diaphragm (Em = 200...Ch. 9 - Estimate the differential pressure limit for a...Ch. 9 - The pressure fluctuations in a pipe filled with...Ch. 9 - What is the sensitivity of a pitot-static tube...Ch. 9 - A pitot-static pressure probe inserted within a...Ch. 9 - A tall pitot-static tube is mounted through and...Ch. 9 - The pressure transmission line response equation...Ch. 9 - Prob. 9.26PCh. 9 - Prob. 9.28PCh. 9 - Compare the inertance of water in a 0.2-m-long...Ch. 9 - The output from a resting healthy human adult...Ch. 9 - Prob. 9.31PCh. 9 - A pressure drop of 213 Pa is measured between two...Ch. 9 - Wall pressure taps (e.g., Figs. 9.19 and 9.21) are...Ch. 9 - Prob. 9.34PCh. 9 - Prob. 9.35PCh. 9 - Determine the resolution of a manometer required...Ch. 9 - A long cylinder is placed into a wind tunnel and...Ch. 9 - Prob. 9.38PCh. 9 - Prob. 9.39PCh. 9 - What is the sound pressure in pascals if the...Ch. 9 - A 6-mm-diameter pitot-static tube is used as a...Ch. 9 - For the thermal anemometer in Figures 9.31 and...Ch. 9 - Determine the static sensitivity of the output...Ch. 9 - A laser Doppler anemometer setup in a dual-beam...Ch. 9 - A set of 5,000 measurements of velocity at a point...Ch. 9 - Aircraft airspeed is measured using a pitot...
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- 3) A piece of machinery is placed in the corner of a manufacturing area (to get it as far away from as many people as possible). If the machinery is generating 96 dB of sound power, what sound pressure level would be experienced my someone standing 1 meter from the machine? (Assume no correction is necessary for atmospheric temperature or pressure). dB for 25 minutes:arrow_forwardA piezometer was connected to a pipe to measure the pressure of water. The rise of water level in piezometer was 150 mm. Calculate the pressure of water. [Ans = 1471.5 N/m2 ]arrow_forward23 ft^3 of air was drawn from a ventilation duct and measured by means of a dry gas meter. the meter's temperature averaged 60 F and the meter gage pressure was -1.9" H2O. Barometric pressure during the sampling was 752 mm Hg. Calculate the volume in standard cubic feet and in standard cubic meter (25C, atm)arrow_forward
- The local atmospheric pressure is 757.8 mmHg. Express 1.254 atm absolute in terms of (a) dynes/cm2 absolute and (b) psi gauge.arrow_forwardHow can we measure the sound pressure level of the noise generated by a machine by Formula for Decibel (dB)arrow_forwardV- When one person shouts at a football game, the sound intensity level at the center of the field is 60.0 dB. When all the people shout together, the intensity level increases to 109 dB. Assuming that each person generates the same sound intensity at the center of the field, how many people are at the game?arrow_forward
- If the vacuum pressure is 5 psi, what will be the absolute pressure in SI unit (Pa)?arrow_forward5) A piece of machinery is enclosed in a sound-dampening cabinet, but you are concerned that the noise level is still too high for nearby workers. You make a measurement of absolute pressure exerted by the sound wave 1 ft outside the (closed) cabinet and find that the sound coming from it is 4.8 Pa. a) What is the sound pressure level at the location where you took the measurement? (i.e., 1 ft from the cabinet). b) You have been asked to draw a circle around the machinery cabinet to indicate the boundary beyond which hearing protection is not required. How far from the machinery must you be to be below the OSHA PEL of 90 dB (provide radius in ft)? c) If a worker spends 3 hrs working near the cabinet, what would their total dose be? Assume: 1) an 8-hr shift, 2) the average distance from the cabinet during the exposed portion of the shift is 1 ft (the same distance as the measurement), and 3) that the other 5 hrs had 0 exposure to noise. d) Should hearing protection be required? If so,…arrow_forwardPressures up to 2000 atm are measured with a dead-weight gauge. The piston diameter is 4 mm. What is the approximate mass in kg of the weights required? [Write your answer to the nearest whole number]arrow_forward
- Problems Chapter 17 of "Physics for Scientists and Engineers", 10th ed. by Serway and Jewet. Two sound waves arrive at your ear simultaneously; they have slightly different frequencies: wi and w2 and equal amplitudes. You hear the loudness oscillate sinusoidally; this is what we refer to as "beats". Show that the total sound wave has the the form: P(t) = Patm + 28P cos((w1 - w2)/2) cos((w1 + w2)/2). (1) e, bimagination Cosl lWi-We) + Cos/ (W,+We)+ Real puth Releiter Reterort ot above expussion Real purts Coslwit) + Cos (We t)arrow_forwardstate the following pressures as absolute pressure in pascals relative to 1 standard atmosphere 1. -1.0132kPa 2. 760 mmHg 3. 29.92 in Hg absolute 4. 5 lb/in^2arrow_forwardThere are different types of pressures: atmospheric, barometric, gauge, absolute and vacuum pressure. Refer to Figure 5.18 below: Vacuum Vacuum Helium 20inHg Helium 30inHg , 宁大 (a) (b) (c) (a) What kind of pressure (the 20 inHg) is measured in Figure 5.18 (a)? (b) What kind of pressure (the 30 inHg) is measured in Figure 5.18 (b)? (c) What would the h reading Figure 5.18 (c) assuming that the pressure and temperature inside and outside the helium tank are the same as in part (a) and (b)?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY
Elements Of Electromagnetics
Mechanical Engineering
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Oxford University Press
Mechanics of Materials (10th Edition)
Mechanical Engineering
ISBN:9780134319650
Author:Russell C. Hibbeler
Publisher:PEARSON
Thermodynamics: An Engineering Approach
Mechanical Engineering
ISBN:9781259822674
Author:Yunus A. Cengel Dr., Michael A. Boles
Publisher:McGraw-Hill Education
Control Systems Engineering
Mechanical Engineering
ISBN:9781118170519
Author:Norman S. Nise
Publisher:WILEY
Mechanics of Materials (MindTap Course List)
Mechanical Engineering
ISBN:9781337093347
Author:Barry J. Goodno, James M. Gere
Publisher:Cengage Learning
Engineering Mechanics: Statics
Mechanical Engineering
ISBN:9781118807330
Author:James L. Meriam, L. G. Kraige, J. N. Bolton
Publisher:WILEY
Intro to Compressible Flows — Lesson 1; Author: Ansys Learning;https://www.youtube.com/watch?v=OgR6j8TzA5Y;License: Standard Youtube License