ACOUSTICS, Physics

Assignment Help:
* Question 1 :
Sound A has intensity 10 times the threshold if hearing : sound B has intensity 100 times the threshold of haring . How much louder do we perceive sound B ?

* Question 2 :
The distance from a point source of sound to the left ear is 2.00 m and the distance to the right ear is 2.01 m .
A) Estimate the differences in time between sound reaching the ears from this source .
B) Calculate the sound intensity at the right ear compared to at the left ear .

* Question 3 :
During a typical eight-hour workday , the average sound intensity arriving at Suzy''s ear is 1.8× 10-5 W/m2 . If the area of Suzy’s ear through which the sound passes is 2.1× 10-3 m2 , what is the total amount of sound energy entering her ear each workday ?

* Question 4 : ( Decibel scale – Calculation )
A) In dB , what is the differences between two intensities differing by factor of two , using the lower intensity as the reference ?
dB=10 log??10 ? (I2/I1) = 10 ?log?_10?× ((2×I_2)/I_1 )
B) A noise is measured at 2×10-3 W/m2 . What is this in Db ?
dB=10 log??10 ? (I2/I1) = 10 ?log?_10? ×((2×?10?^(-3) )/?10?^(-12) )

Related Discussions:- ACOUSTICS

Plane transmission grating, Discuss the diffraction of light through n slit...

Discuss the diffraction of light through n slits using plane transmission grating.

Evaluate the amount of heat transfer, Determine the amount of heat transfer...

Determine the amount of heat transfer required to convert 200 g(0.200kg) of ice to vapor if the initial temperature of the ice is25 degrees C and the final temperature is 100 degre

The mass of 1 mole of electrons is, The mass of 1 mole of electrons is: ...

The mass of 1 mole of electrons is: (1) 9.1x 10 -28 g (2) 1.008mg (3) 0.55mg (4) 9.1x 10 -27 g Ans:  (3)0.55mg

What is value of amplification factor for valve, A triode valve which is ac...

A triode valve which is acting as an amplifier gives a voltage gain of 30. If anode resistance is 20 K ? for valve and load resistance is 60 K ?, what is value of amplification fac

What is the mass of the board - force, A board that is 1.5 m long is suppor...

A board that is 1.5 m long is supported in two places. If the force exerted by the first support is 25 N and the forced exerted by the second is 62 N. what is the mass of t

Effect on newton''s ring, Q. W hat will be effect on Newton's rings if; ...

Q. W hat will be effect on Newton's rings if; (i)      A little oil (µ = 1.65) is introduced between the lens (µ - 1.5) and the glass plate (µ = 1.75). (ii)    A Pla

What are echelon effects and focusing, Show any two applications of beats. ...

Show any two applications of beats. What are "Echelon effects" and "Focusing"?

State the faraday laws of electromagnetic induction, a.  State the Faraday'...

a.  State the Faraday's laws of electromagnetic induction. b.  A conducting circular loop is placed in an uniform magnetic field B=0.020 T with its plane perpendicular to the fi

An egg beater, An egg beater Study an egg beater, hand drill or some o...

An egg beater Study an egg beater, hand drill or some other device in which an enhance of speed is obtained by means of gears.

Motion, An athlete run a certain distance before taking a long jump. Why?

An athlete run a certain distance before taking a long jump. Why?

Write Your Message!

Captcha
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