Measured in frequency bands of constant width

Assignment Help Mechanical Engineering
Reference no: EM13711510

White noise has a constant level when measured in frequency bands of constant width. Suppose a noise generator produces white noise over the octave bands 0.5,1,2,4,8 khz. Find the overall un weighted and a-weighted sound pressures if a sound pressure level of 90 dB is measured in the 4kHz octave band.

Reference no: EM13711510

Questions Cloud

Determine the mass flow rate through the compressor : Carbon Dioxide (CO2) gas enters a compressor steadily at 10 KPa and 540K with a velocity of 200m/s. The carbon dioxide leaves the compressor at 3MPa and 900K with a velocity of 40m/s. The exit of the compressor is .006m^2. The heat transfer rate from..
For mass-spring-damper accelerometer : For mass-spring-damper accelerometer, calculate the mass needed to achieve mechanical noise limit a_rms = 1 nG if the mechanical resonance frequency is to be f=100 Hz.
Gas in a closed system undergoes the power cycle : Gas in a closed system undergoes the power cycle as shown in the p-v diagram below as described by 1->2 is a constant pressure process, 2-> 3 is a constant volume process and 3 -> 1 is a pV = const. process. The internal energy U1 = U2 = 30 kJ/kg and..
Vertical piston cylinder is heated at constant pressure : Water in a vertical piston cylinder is heated at constant pressure of 10 bar. It is initially at 179.9 0C and has a specific volume of 0.1 m3/kg and is heated to a final specific volume of 0.248 m3/kg. Changes in kinetic and potential energies are ze..
Measured in frequency bands of constant width : White noise has a constant level when measured in frequency bands of constant width. Suppose a noise generator produces white noise over the octave bands 0.5,1,2,4,8 khz. Find the overall un weighted and a-weighted sound pressures if a sound pressure..
Single-stage ideal regenerative steam cycle : A single-stage ideal regenerative steam cycle has a boiler pressure and temperature of 5000 kPa and 500 C, and a condensing pressure of 10 kPa. The extraction pressure is 500 kPa.
The temperature of the gases leaving the compressor : A diesel engine is fitted with a turbocharger that comprises a radial flow compressor driven by a radial flow exhaust gas turbine. The gravimetric air-fuel ratio is 20:1; the air is drawn into the compressor at a pressure of 1 bar and at a temperatur..
Estimate the molar volume of isobutane at initial : Saturated isobutane vapor at 320 K is contained in a piston-cylinder assembly. It is expanded to 3 bar by a reversible isothermal process. At 320 K, the vapor pressure of isobutane is 6.243 bar. Using the truncated virial equation of state, i.e. with..
Thrown upward from the ground with an initial velocity : Ball A is thrown vertically upward from the top of a 25-m-high-building with an initial velocity of 5m/s . At the same instant another ball B is thrown upward from the ground with an initial velocity of 20m/s.

Reviews

Write a Review

Mechanical Engineering Questions & Answers

  Frictionless slot that lies in the vertical plane

The 8-lb block slides in a frictionless slot that lies in the vertical plane. The stiffness’s of springs A and B attached to the block are kA =40 lb/ft and kB= 20 lb/ft. When the block is in position 1, spring A is compressed 0.5 ft and spring B is u..

  Charge of melting and casting for making alloy

Assuming that you are a process engineer in charge of melting and casting for making an alloy that consists of 40 at% Ag and 60 at% Ni. Calculate how many grams of Ag and Ni you need to weigh to make a 400-gram solder alloy with such a composition. G..

  A heat engine accepts 200000 btu of heat from a source at

a heat engine accepts 200000 btu of heat from a source at 1500 r and rejects 100000 btu of heat to a sink at 600 r.

  A steel bar and an aluminum bar are joined end to end and

a steel bar and an aluminum bar are joined end to end and fixed between two walls. the cross sectional area of the

  Assume constant specific heats where cwater 4179 kjkg-k

initially an insulated rigid tank contains 18.67 kg of water at 21.45oc and 101 kpa. the tank also contains a 3.66 kg

  Determine the maximum contact pressure

The wheel of a crane lift is rolling on a flat rail. The radius of the wheel is 4 in, the contact length and force are 2.5 in and 1 ton respectively, and E = 30 MPa and ν = 0.3 for both parts. Determine (a) the maximum contact pressure, (b) the wi..

  Heat is slowly removed from the steam during a constant

saturated steam at 2 mpa is contained in a piston-cylinder device. the initial volume is 0.25 cubic meters. heat is

  Determine temperature at which condensation first occurs

Propane at 8 bars and 80oC is contained in a closed, rigid vessel with a volume of 10 m3 . Its temperature drops due to heat transfer to the surroundings. Determine (a) the temperature at which condensation first occurs and (b) the fraction of the to..

  If the ambient temperature is 10 oc determine the rate of

on an oil tanker saturated steam at 44 bar is supplied to deck auxiliaries through a steel pipe of 124 mm bore and 18

  Determine the factor of safety against brittle fracture

Determine the factor of safety against net section yield in the presence of the crack and determine the factor of safety against brittle fracture for the same conditions.

  During the expansion some of the water evaporates but no

ten grams of liquid water at 95 c are contained in the insulated container shown. the pin holding the frictionless

  When operated at 2600 rpm this engine produces 98 hp

a 6-cylinder 3.8 l spark ignition engine operating on the ideal otto cycle takes in air at 104 kpa and 20 degrees

Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd