8. A person standing a certain distance from twenty identical loudspeakers is hearing a sound level intensity of 115 dB. What sound level intensity would this person hear if four are turned off? dB 160 ssfo sf60 ssfo 160 ssf60

8. A person standing a certain distance from twenty identical loudspeakers is hearing a sound level intensity of 115 dB. What sound level intensity would this person hear if four are turned off? dB 160 ssfo sf60 ssfo 160 ssf60

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter14: Sound

Section: Chapter Questions

Problem 15P: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies...

See similar textbooks

Related questions

Q: The frequency separating audible waves and ultrasonic waves is considered to be 20 kHz. What…

A: Given Frequency f=20000Hz Speed of sound v=340m/s

Q: The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a…

Q: You have two pipes with length 1 m(pipe1) and 2m(pipe2). Calculate the fundamental frequencies of…

A: Given Data: The length of pipe1 is: l1=1 m The length of pipe2 is: l2=2 m The velocity of sound is:…

Q: Two cars, one in front of the other, are traveling down the highway at 25 m/s. The car behind sounds…

Q: A sound wave moves through a medium with density 480kg/m^3 when it encounters a medium with density…

Q: 20) What is the intensity of a 70-dB sound? The threshold of human hearing is 1.0 × 10-12 W/m2. A)…

Q: Intensity of sound = (10] ^(-6) W/m^2, measured the intensity level? if the sound inaudible or…

Q: A piano tuner creates an 880.0 Hz tone. When he plucks a piano string, the two waves create a beat…

A: The frequency f1 = 880 Hz Beat = 5 Hz Let the second frequency be f2

Q: What is the speed of sound at a temperature of 300 K? O 330 m/s 340 m/s O 6030 m/s O 348 m/s

A: Speed of sound with temperature varies as v = 331 m/s + (0.6 m/s °C ) T Given temerature T = 300 K…

Q: A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies…

Q: 6. The intensity levels of two people's speech are 63.0 dB and 64.5 dB, respectively. What is the…

A: The 'dB' unit is a logarithmic unit, therefore we can not simply directly add them. We need to use a…

Q: 9) What is the loudness, in decibels, of a sound 16 trillion times as loud as the softest audible…

A: Given data: I=16 trillion times of sound I=16×1012I0

Q: the speed of sound in a solid medium is 15 times greater than that in air. if the frequency of a…

A: The given data are: f=39 kHz=39×103 Hzv=344 m/svs=15v=15344 m/s=5160 m/s Here, f denotes the…

Q: An 180 dB sound can cause permanent hearing damage. By what factor is this larger than the quietest…

A: The quietest audible sound for human is 0 dB.

Q: What sound intensity is 4 dB louder than a sound intensity 12 μW/cm².

Q: 8. An organ pipe is 115 cm long. What is the third audible harmonic if the pipe is closed at one…

Q: 11 Sound waves whose intensities about 1 W/m^2 cause damage to the ear. How many decibels is this…

Q: The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a…

A: Given, The speed of sound in a solid medium is 15 times greater than that in air. Frequency of wave…

Q: Q14/The intensity in w/m? of a sound level of 60db is-- - knowing that the threshold of hearing =…

A: Given: Sound level = 60db. L = 60 db or 6bel Threshold of hearing Io = 10-12 w/m2 To determine:…

Q: Two identical loudspeakers separated by distance d emit 170 Hz sound waves along the x-axis. As you…

A: It is given that,

Q: 10. A trailer truck traveling east at 40.0 m/s sounds a 800 Hz horn. What is the wavelength of the…

Q: 10 What should be the decibel rating of a sound if it has to be twice as loud as a 13 dB sound?…

A: Given that: β1=13 dB

Q: What is the maximum frequency of sound, which can be heard by human? O a. 2 KHz O b. 20 Hz O c.…

A: A wave consists of a number of cycles, these cycles repeat themselves after a particular time. The…

Q: A bat can detect small objects, such as an insect, whose size is approximately equal to one…

A: Given that, frequency of sound in air is 60.0 x 103 Hz, and the speed of sound in air is 343 m/s.

Q: 7. What is the combined level of noise of five sound levels which are: 75dB, 85dB, 91dB, 73dB, and…

Q: 9. A 45-cm length of wire has a mass of 5.8 g. It is stretched between two fixed supports and is…

A: Given data: Length (L) = 45 cm = 0.45 m Mass (m) = 5.8 g = 0.0058 kg Tension (T) = 150 N Required:…

Q: The lower intensity that a human can hear (which is represented with the symbol I0) is about 1x10-12…

A: The intensity of an sound is defined as a ratio of power and per unit area carried by wave. The…

Q: The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a…

Q: flutists are tuning their flutes with one playing a 560 Hz tone and the other playing a 548 Hz tone.…

A: In the given question, it's given that one flute is playing a frequency of 560 Hz and another…

Q: You are watching a live music show, and at the location of the stage, where all the speakers are…

A: Given:- The intensity of the sound is I = 469.92 mW/m2. The distance from the stage of the person…

Q: A string on a musical instrument is fixed at both ends - like a guitar. If the length of the string…

A: The answer is given below

Q: 2. Dogs have the ability to hear sounds up to 40,000 Hz. If the speed of sound is 340 m/s, what is…

Q: A sound wave of frequency 880 Hz and power 50.0 W creates loudness at a sound meter of 40.0…

A: In this question we have to find the increase in sound level. Please give positive feedback if the…

Q: Resonances of the ear canal lead to increased sensitivity of hearing, as we’ve seen. Dogs have a…

Q: When poked by a spear, an operatic soprano lets out a 1047 Hz shriek. What is its wavelength (in m)…

A: Given: speed of sound vs=345 m/sfrequency f = 1047 Hz

Q: Sound is passing perpendicularly through an open window whose dimensions are 1.1 m × 0.75 m. The…

A: Given: A = 1.1 x 0.75 m2 = 0.825 m2 dB = 95 dB Io = 10-12 W/m2

Q: What is the dynamic range of human ear? a. threshold of hearing (W/m2 ) b. threshold of pain (W/m2 )…

A: (a) Threshold of hearing is 0 dB that is 10-12 W/m2.

Q: The speed of sound in a solid medium is 15 times greater than that in air. If the frequency of a…

A: Speed of sound in air (v) = 344 msSpeed of sound in solid medium (V) = 15×v= 15×344= 5160…

Q: What is the maximum frequency of sound heard by human ears? а. 20 Hz b. 200 KHz С. c. 2 KHz d. 20000…

A: What is asked :- maximum frequency of sound a human ears can hear.

Q: You are overhearing a very heated conversation that registers 80 dB. You walk some distance away so…

A: Write the given values with suitable variables. Here, β1 denotes the initial sound intensity level,…

Q: Q15/The sound level in db of a sound intensity 10 w/m2 is-- knowing ---- that the threshold of…

Q: 10. Loudspeakers A and B are vibrating in phase and are playing the same tone, which has a frequency…

A: When two light or sound waves pass past each other, they will cause interference. Individual waves…

Q: Two sound waves arrive to an observer, the first is loud at 2 W/m ^2 and the second one is quieter…

A: Write the expression for the intensity of first sound.

Q: A tuba may be treated like a tube closed at one end. If a tuba has a fundamental frequency of 59.4…

A: In a linear bounded medium when one boundary is rigid and other free, only odd harmonics are…

Q: The highest frequency sound humans can hear is about 20,000 Hz. What is the wavelength of sound in…

A: Given: Frequency of sound f=20,000 Hz speed of sound v=343 m/s

Q: Two boys are whispering in the library. The radiated sound power from one boy's mouth is 1.2 × 10–8…

Q: When poked by a spear, an operatic soprano lets out a 1169 Hz shriek. What is its wavelength (in m)…

Q: The siren emits sound with a frequency of 600 Hz. What is the wavelength of the sound? What…

A: Given data: Frequency of sound (f) = 600 Hz Speed of listener (Vo ) = 10 m/s

Q: In a textile mill, workers spend 2 hours preparing stock in an area where the sound level is 92 dBA,…

A: OSHA 's permissible exposure limit=90 dBA for 8-hours shiftFiven 2 hours→ 92 dBA 2…

Q: A student sitting in class detects a sound intensity of 6.27×10−76.27×10−7 W/m2 from the teacher…

A: Given value--- Intensity = 6.27 × 10-7 W/m2 . power = 5.43 × 10-4 W . We have to find--- how far…

Concept explainers

Stretched string

A stretched string is a wire which is made up of any metal that must have a larger length compared to its thickness. The ends of the wire are fixed, and when they oscillate or are plucked, it produces two reflected transverse waves of the same frequency and same amplitude. The waves or pulses are traveling in alternate directions and superimpose with one another. This waveform is named standing or stationary waves.

Question

8. A person standing a certain distance from twenty identical loudspeakers is hearing a sound level intensity of 115 dB.
What sound level intensity would this person hear if four are turned off?
dB
60 SS
ssf60 s
160 ssfo
60 ssf60

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.

Similar questions

As you travel down the highway in your car, an ambulance approaches you from the rear at a high speed (Fig. OQ17.3) sounding its siren at a frequency of 500 Hz. Which statement is correct? (a) You hear a frequency less than 500 Hz. (b) You hear a frequency equal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than 500 Hz. whereas the ambulance driver hears a frequency lower than 500 Hz. (e) You hear a frequency less than 500 Hz. whereas (he ambulance driver hears a frequency of 500 Hz.
A person wears a hearing aid that uniformly increases the intensity level of all audible frequencies of sound by 30.0 dB. The hearing aid picks up sound having a frequency of 250 Hz at an intensity of 3.0 1011 W/m2. What is the intensity delivered to the eardrum?
With a sensitive sound-level meter, you measure the sound of a running spider as -10 dB. What does the negative sign imply? (a) The spider is moving away from you. (b) The frequency of the sound is too low to be audible to humans. (c) The intensity of the sound is too faint to be audible to humans. (d) You have made a mistake; negative signs do not fit with logarithms.
Based on the graph in Figure 17.36, what is the threshold of hearing in decibels for frequencies of 60, 400, 1000, 4000, and 15,000 Hz? Note that many AC electrical appliances produce 60 Hz, music is commonly 400 Hz, a reference frequency is 1000 Hz, your maximum sensitivity is near 4000 Hz, and many older TVs produce a 15,750 Hz whine. Figure 17.36 The relationship of loudness in phons to intensity level (in decibels) and intensity (in watts per meter squared) for persons with normal hearing. The curved lines are equal-loudness curves—all sounds on a given curve are perceived as equally loud. Phons and decibels are defined to be the same at 1000 Hz.
A tuning fork is known to vibrate with frequency 262 Hz. When it is sounded along with a mandolin siring, four beats are heard every second. Next, a bit of tape is put onto each line of the tuning fork, and the tuning fork now produces five beats per second with the same mandolin siring. What is the frequency of the string? (a) 257 Hz (b) 258 Hz (c) 262 Hz (d) 266 Hz (e) 267 Hz
As you travel down the highway in your car, an ambulance approaches you from the rear at a high speed (Fig. OQ13.15) sounding its siren at a frequency of 500 Hz. Which statement is correct? (a) You hear a frequency less than 500 Hz. (b) You hear a frequency equal to 500 Hz. (c) You hear a frequency greater than 500 Hz. (d) You hear a frequency greater than 500 Hz, whereas the ambulance driver hears a frequency lower than 500 Hz. (e) You hear a frequency less than 500 Hz, whereas the ambulance driver hears a frequency of 500 Hz. Figure OQ13.15
The area of a typical eardrum is about 5.00 X 10-5 m2. (a) (Calculate the average sound power incident on an eardrum at the threshold of pain, which corresponds to an intensity of 1.00 W/m2. (b) How much energy is transferred to the eardrum exposed to this sound lor 1.00 mill?
What sound intensity levels must sounds of frequencies 60,3000, and 8000 Hz have in order to have the same loudness as a 40dB sound of frequency 1000 Hz (that is, to have a loudness of 40 phons)?
As the people sing in church, the sound level everywhere inside is 101 dB. No sound is transmitted through the massive walls, hut all the windows and doors are open on a summer morning. Their total area is 22.0 m2. (a) How much sound energy is radiated through the windows and doors in 20.0 min? (b) Suppose the ground is a good reflector and sound radiates from the church uniformly in all horizontal and upward directions. Find the sound level 1.00 km away.
A flute has a length of 58.0 cm. If the speed of sound in air is 343 m/s, what is the fundamental frequency of the flute, assuming it is a tube closed at one end and open at the other? (a) 148 Hz (b) 296 Hz (c) 444 Hz (d) 591 Hz (e) none of those answers
The bulk modulus of water is 2.2 109 Pa (Table 15.2). The density of water is 103 kg/m3 (Table 15.1). Find the speed of sound in water and compare your answer with the value given in Table 17.1.