(a) Does a sound level of 0 dB mean that there is no sound? (b) Is there any physical meaning to a sound having a negative intensity level? If so, what is it? (c) Does a sound intensity of zero mean that there is no sound? (d) Is there any physical meaning to a sound having a negative intensity? Why?
Q: A sound wave with intensity 2 x 10 -3 W/m2 is perceived to be modestly loud. Your eardrum is 6 mm in…
A: Intensity of sound (I) = 0.002 Wm2Diameter of eardrum (d) = 6 mm
Q: A jet engine emits sound uniformly in all directions, radiating an acoustic power of 2.19 x 10 W.…
A: The intensity of the sound at a distance is given by,I=PA......(1)where, I is the intensity of sound…
Q: A jet engine emits sound uniformly in all directions, radiating an acoustic power of 3.13×105 W.…
A: Given data Radiation of acoustic power is P=3.13×105 W Distance between the source and the engine…
Q: A member of an aircraft maintenance crew wears protective earplugs that reduce the sound intensity…
A: The sound intensity level experienced by the crew member,
Q: The decibel level of a sound is defined to be $100 (7) B= 10 log where I is the intensity of the…
A: A train horn with a decibel rating ofwith a radius of.We need to find the intensity of the train…
Q: But suppose the distance increases by the factor 4.3. (A) Now what is the change in sound intensity?…
A: Given, the distance increases by a factor 4.3, let the initial distance be r1 and the new distance…
Q: Sound from source 2 has a sound intensity level that is 15.0 dB higher than sound from source 1. By…
A:
Q: A sound wave from a siren has an intensity of 118.7 W/m2 at a certain point, and a second sound wave…
A:
Q: Move away from a sound source, from distance r, to r₂ = 2₁. (A) By what factor does the intensity…
A: Intensity is inversely proportional to the square of the distance from the source. β = 10 logI/I0 β…
Q: A source of sound has an intensity I1 and when its sound level is measured at a fixed distance the…
A: The initial sound intensity of the source is The final sound intensity of the source is The…
Q: 2) A dust particle has 1.00 x 10^16 protons and a net charge of 0.300 pico Coulomb. a) How many…
A: a) Number of fewer electrons is,
Q: What is the decibel level of a sound that has an intensity of 57.5 x 10-5 W/m2? Assume the…
A: The sound intensity is The reference intensity is Find:Sound level for given sound intensity.
Q: A sound wave from a siren has an intensity of 89.1 W/m2 at a certain point, and a second sound wave…
A: Given:Intensity,I=89.1 W/m2Intensity level= 10 dB Find he intensity level of the sound wave due to…
Q: A point source emits sound isotropically. The sound intensity is 0.02 W/m² at a distance of 7 m from…
A:
Q: A sound has a certain intensity I1. It suddenly increases to I2 so that I2 = 250I1. What is the…
A: We can calculate sound level β of the sound of intensity I from its definition. β (dB)=10log10II0
Q: Move away from a sound source, from distance r, to r₂ = 2₁. (A) By what factor does the intensity…
A:
Q: Doubling the power output from a sound source emitting a single frequency will result i what…
A: The intensity of the sound is high then the sound will also be louder. The sound intensity level…
Q: Problem 6. The low-frequency speaker of a stereo set has a surface area of 0.05 m² and produces 1 W…
A: Given: A=0.05 m2P=1 W
Q: What is the decibel level of a sound that has an intensity of 87 x 10-5 W/m?? Assume the standard dB…
A:
Q: The sound intensity at a certain location is 4.0×10-6 W/m2. What is the sound intensity level at…
A: Given : Intensity at certain level (I) = 4.0×10-6 W/m2. threshold intensity (I0) = 1 x 10-12…
Q: A teacher shouting at the top of his lungs emits about 1.0 W of energy as sound waves. Student A is…
A:
Q: You like to listen to music at a sound intensity of 3.3×10−53.3×10−5 W/m2. What is the intensity…
A: Given: The intensity of the sound is 3.3x10-5 W/m2. The intensity of sound for threshold hearing is…
Q: The source of a sound wave has a power of 6.43 W. If it is a point source, (a) what is the intensity…
A:
Q: A sound has a high pitch and a low volume. What is probably true of this sound wave?
A: Pitch of a sound depends on the frequency of the sound. High pitch means shrill or high frequency…
Q: Sound is detected when a sound wave causes the eardrum to vibrate. Typically, the diameter of the…
A: The intensity of sound waves can be defined as I=PmaxA.....1Pmax -The maximu power reaching the area…
Q: Two students hear the same sound and their eardrums receive the same power from the sound wave. The…
A: Given that First Intensity I1 = 0.79 W/m2 Second intensity I2 = (1.18)(0.79) W/m2 = 1.18I1 Diameter…
Q: A person perceives a sound that was produced 4 meters from them. How much less intense would the…
A: Intensity of a sound is inversely proportional to the square of the distance from the source.…
Q: f a sound that has a level 3.00 dB lower than a 3.33 ✕ 10−9 W/m2 sound? (b)
A: Givenβ=3 dB
Q: (a) What is the intensity (in W/m³) of a sound that has a level 3.00 d8 lower than a 4.03 x 10-"…
A: The total amount of sound energy flowing per unit time per unit area perpendicular to the direction…
Q: The relationship between the number of decibles B and the intensity I in watts per square meteris…
A: Let original intensity = I new intensity = 100 I B = 10 log ( I * 1012)B1 = 10 log ( I * 1012)B2 =…
Q: A speaker is talking at a distance of 3.0 m from where you are and you measure the sound intensity…
A: a) The intensity of the sound is inversely proportional to the square of the distance. So, the final…
Q: A sound level of 0 dB corresponds to a sound intensity of 0 W/m2. True or False?
A: Sound waves are longitudinal waves. This implies that the direction of propagation of the sound wave…
(a) Does a sound level of 0 dB mean that there is no sound? (b) Is there any physical meaning to a sound having a negative intensity level? If so, what is it? (c) Does a sound intensity of zero mean that there is no sound? (d) Is there any physical meaning to a sound having a negative intensity? Why?
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
- The lower intensity that a human can hear (which is represented with the symbol I0) is about 1x10-12 W/m2. However, a loud music venue may have sounds that are near 1.0 W/m2 (though sound as this intensity would cause permanent damage to your ears). Because the human ear can detect frequencies over such a large range of intensities, more often a sound intensity level is used. This level is defined as: β=10 ⋅ log10 ⋅ I/I0 If a person speaks with an intensity of 4.062 μW/m2, what is the sound intensity level in decibels?Ultrasound waves at intensities above 104 W/m² can do serious damage to living tissues. ▷ & If 10² W/m² corresponds to 160 dB, what is the sound intensity level, in decibels, of ultrasound with intensity 10³ W/m². used to pulverize tissue during surgery? B= dB Grade Summary DeductionsThe sound intensity a distance d1 = 17.0 m from a lawn mower is 0.200 W/m2. What is the sound intensity a distance d2 = 34.0 m from the lawn mower? (Enter your answer in W/m2.)
- An audio engineer takes decibel readings at distances of r1 = 13 m and r2 = 21 m from a concert stage speaker during a sound check. When he is r1 from the speaker, the engineer registers a decibel level of β1 = 104 dB on his loudness meter. What is the intensity of the sound, I1, in watts per square meter, that is measured by the loudness meter when the engineer is a distance of r1 from the speaker? How much power P, in watts, is coming from the speaker during the sound check at distance r1? Assuming that the speaker output does not change between the two measurements at r1 and r2, what sound intensity level β2, in decibels, will the loudness meter report when the engineer is at a distance r2 from the speaker?True or False: The sound level of a wave with intensity 4.0*10-8 W/m2 is calculated as: 10dB log(4.0x10^4)The sound intensity of a conversation at a distance of 6.0 m is 1.7 x 10^-7 W/m2. Determine the intensity at a distance of 5.0 m. Assume that the sound propagates uniformly in all directions.
- 1. (a) What is the intensity of a sound that has a level 7.5 dB lower than a 4.10-9 Intensity: W m² (b) What is the intensity of a sound that is 2 dB higher than a 4-10-⁹ Intensity: W m² W m² W m² sound? sound?What is the decibel level of a sound that has an intensity of 10.4 x 10-5 W/m2? Assume the standard dB level scale where the reference intensity is 1 x 10-12 W/m212 gives the loudness of sound L (in dB) based on the intensity of sound I (in W/m²). The value I = 10 The formula L=10 log threshold for hearing for midfrequency sounds. Hearing impairment is often measured according to the minimal sound level (in dB) detected by an individual for sounds at various frequencies. For one frequency, the table depicts the level of hearing impairment. Category Mild Moderate Moderately severe Severe Profound Loudness (dB) 26≤L≤40 41≤L≤55 56≤L≤70 71 ≤L≤90 L>90 W/m is the minimal (a) If the minimum intensity heard by an individual is 9421.4 x 108 W/m², determine if the individual has a hearing impairment. Round to the nearest tenth. (b) If the minimum loudness of sound detected by an individual is 40 dB, determine the corresponding intensity of sound.
- The difference in two sound levels, β1 and β2, in decibels (dB), is given by the logarithmic equationβ2 − β1 = 10 log ( I2/,I1) where I2/I1 is the ratio of their intensities. a) The sound level of a jet at take off is 140 dB, while the level of a normal conversation is 50 dB. What is the ratio of the intensities of the sound level of the jet versus the level of normal conversation? b) What is the loudness of a jackhammer (in use) if it is known that this sound has anintensity 10 times that of sound due to heavy city traffic (90 dB)?(a) What is the intensity (in W/m?) of a sound that has a level 3.00 dB lower than a 4.03 x 10-9 w/m? sound? W/m? (b) What is the intensity (in W/m2) of a sound that is 10.0 dB higher than a 4.03 x 10-9 W/m? sound? W/m?Suppose that a public address system emits sound uniformly in all directions and that there are no reflections. The intensity at a location 27 m away from the sound source is 3.0 X 10-4 W/m2. What is the intensity at a spot that is 80 m away?