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Question 1
C
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
5%
(low)
Question Stats:
87% (01:54) correct
13%
(02:05) wrong
based on 69
sessions
History
Date
Time
Result
Not Attempted Yet
Question 2
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
15%
(low)
Question Stats:
75% (00:40) correct 25%
(00:47) wrong
based on 71
sessions
History
Date
Time
Result
Not Attempted Yet
Question 3
B
Be sure to select an answer first to save it in the Error Log before revealing the correct answer (OA)!
Difficulty:
25%
(medium)
Question Stats:
78% (01:11) correct 22%
(01:15) wrong
based on 68
sessions
History
Date
Time
Result
Not Attempted Yet
A logarithmic unit known as the decibel (dB) is used to represent the intensity of sound. The decibel scale is similar to the Richter scale used to measure earthquakes. On the Richter scale, a 7.0 earthquake is ten times stronger than a 6.0 earthquake. On the decibel scale, an increase of 10 dB is equivalent to a 10-fold increase in intensity or power. Thus, a sound registering 80 dB is ten times louder than a 70 dB sound. In the range of sounds audible to humans, a whisper has an intensity of 20 dB; 140 dB (a jet aircraft taking off nearby) is the threshold of immediate pain.
The perceived intensity of sound is not simply a function of volume; certain frequencies of sound appear louder to the human ear than do other frequencies, even at the same volume. Decibel measurements of noise are, therefore, often “A-weighted” to take into account the fact that some sound wavelengths are perceived as being particularly loud. A soft whisper is 20 dB, but on the A-weighted scale, the whisper is 30 dBA. This is because human ears are particularly attuned to human speech. Quiet conversation has a sound level of about 60 dBA.
Continuous exposure to sounds over 80 dBA can eventually result in mild hearing loss, while exposure to louder sounds can cause much greater damage in a very short period of time. Emergency sirens, motorcycles, chainsaws, construction activities, and other mechanical or amplified noises are often in the 80 to 120 dBA range. Sound levels above 120 dBA begin to be felt inside the human ear as discomfort and eventually as pain.
Unfortunately, the greatest damage to hearing is done voluntarily. Music, especially when played through headphones, can grow to be deceptively loud. The ear becomes numbed by the loud noise, and the listener often turns up the volume until the music approaches 120 dBA. This level of noise can cause permanent hearing loss in a short period of time, and in fact, many young Americans now have a degree of hearing loss once seen only in much older persons.
The perceived intensity of sound is not simply a function of volume; certain frequencies of sound appear louder to the human ear than do other frequencies, even at the same volume. Decibel measurements of noise are, therefore, often “A-weighted” to take into account the fact that some sound wavelengths are perceived as being particularly loud. A soft whisper is 20 dB, but on the A-weighted scale, the whisper is 30 dBA. This is because human ears are particularly attuned to human speech. Quiet conversation has a sound level of about 60 dBA.
Continuous exposure to sounds over 80 dBA can eventually result in mild hearing loss, while exposure to louder sounds can cause much greater damage in a very short period of time. Emergency sirens, motorcycles, chainsaws, construction activities, and other mechanical or amplified noises are often in the 80 to 120 dBA range. Sound levels above 120 dBA begin to be felt inside the human ear as discomfort and eventually as pain.
Unfortunately, the greatest damage to hearing is done voluntarily. Music, especially when played through headphones, can grow to be deceptively loud. The ear becomes numbed by the loud noise, and the listener often turns up the volume until the music approaches 120 dBA. This level of noise can cause permanent hearing loss in a short period of time, and in fact, many young Americans now have a degree of hearing loss once seen only in much older persons.
1. The primary purpose of the passage is to
(A) argue for government mandates that decibel levels produced by headphones be reduced
(B) compare the scale used to measure intensity of sound to the scale used to measure the strength of earthquakes
(C) describe the way that sound intensity is measured and explain its effect on human hearing
(D) define which volume levels and sound exposure times are safe for humans and which are harmful
(E) warn readers about the harmful effects of continuous exposure to sounds over 80 dBA
(A) argue for government mandates that decibel levels produced by headphones be reduced
(B) compare the scale used to measure intensity of sound to the scale used to measure the strength of earthquakes
(C) describe the way that sound intensity is measured and explain its effect on human hearing
(D) define which volume levels and sound exposure times are safe for humans and which are harmful
(E) warn readers about the harmful effects of continuous exposure to sounds over 80 dBA
2. The author mentions that “emergency sirens, motorcycles, chainsaws, construction activities, and other mechanical or amplified noises” fall in the 80 to 120 dBA range. It can be inferred from this statement that these noises
(A) are unwanted, outside intrusions common in urban life
(B) can cause hearing loss with constant exposure
(C) are more dangerous to hearing than sounds of the same dBA level from headphones
(D) are loud enough to cause immediate pain
(E) have no negative impacts
(A) are unwanted, outside intrusions common in urban life
(B) can cause hearing loss with constant exposure
(C) are more dangerous to hearing than sounds of the same dBA level from headphones
(D) are loud enough to cause immediate pain
(E) have no negative impacts
3. The second paragraph of the passage states “Decibel measurements of noise are therefore often ‘A-weighted’ to take into account the fact that some sound wavelengths are perceived as being particularly loud. A soft whisper is 20 dB, but on the A-weighted scale the whisper is 30 dBA.” Therefore, for any particular sound, the A-weighted decibel level differs from the unweighted decibel level in that
(A) the A-weighted number is 10 points higher than the unweighted number
(B) the A-weighted number is based on the way the noise is perceived in the human ear
(C) the unweighted number is always higher than the A-weighted number
(D) the A-weighted number is measured by more accurate instruments
(E) only on the unweighted scale does a 10 dB increase in sound equal a ten-fold increase in intensity
(A) the A-weighted number is 10 points higher than the unweighted number
(B) the A-weighted number is based on the way the noise is perceived in the human ear
(C) the unweighted number is always higher than the A-weighted number
(D) the A-weighted number is measured by more accurate instruments
(E) only on the unweighted scale does a 10 dB increase in sound equal a ten-fold increase in intensity
RC Butler 2022 - Practice Two RC Passages Everyday.
Passage # 188 Date: 10-May-2022
This question is a part of RC Butler 2022. Click here for Details
Passage # 188 Date: 10-May-2022
This question is a part of RC Butler 2022. Click here for Details
11 May 2022, 22:54
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In my opinion, answers are 1-E, 2-B,3-B, waiting for official answers.
Thank You
Vighnesh
Thank You
Vighnesh
11 Sep 2022, 23:21
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1. The primary purpose of the passage is to
(A) argue for government mandates that decibel levels produced by headphones be reducednoting mentioned about the government
(B) compare the scale used to measure intensity of sound to the scale used to measure the strength of earthquakesonly first para talks about it
(C) describe the way that sound intensity is measured and explain its effect on human hearing
(D) define which volume levels and sound exposure times are safe for humans and which are harmfulonly last para talks about it
(E) warn readers about the harmful effects of continuous exposure to sounds over 80 dBAits just a sentence or so
2. The author mentions that “emergency sirens, motorcycles, chainsaws, construction activities, and other mechanical or amplified noises” fall in the 80 to 120 dBA range. It can be inferred from this statement that these noises
(A) are unwanted, outside intrusions common in urban life irrelevant
(B) can cause hearing loss with constant exposure
(C) are more dangerous to hearing than sounds of the same dBA level from headphonesin this para nthg mentioned about headphone-
(D) are loud enough to cause immediate painnowhere mentioned immediate pain
(E) have no negative impactsmentioned has negative impacts
3. The second paragraph of the passage states “Decibel measurements of noise are therefore often ‘A-weighted’ to take into account the fact that some sound wavelengths are perceived as being particularly loud. A soft whisper is 20 dB, but on the A-weighted scale the whisper is 30 dBA.” Therefore, for any particular sound, the A-weighted decibel level differs from the unweighted decibel level in that
(A) the A-weighted number is 10 points higher than the unweighted numbernot mentioned specifically
(B) the A-weighted number is based on the way the noise is perceived in the human ear. mentioned- perceived as being loud
(C) the unweighted number is always higher than the A-weighted numbernot mentioned. not necessarily true
(D) the A-weighted number is measured by more accurate instrumentsno mention of instruments
(E) only on the unweighted scale does a 10 dB increase in sound equal a ten-fold increase in intensitynt mentioned. 10 fold is about the scale not unweighted or aweightef
(A) argue for government mandates that decibel levels produced by headphones be reducednoting mentioned about the government
(B) compare the scale used to measure intensity of sound to the scale used to measure the strength of earthquakesonly first para talks about it
(C) describe the way that sound intensity is measured and explain its effect on human hearing
(D) define which volume levels and sound exposure times are safe for humans and which are harmfulonly last para talks about it
(E) warn readers about the harmful effects of continuous exposure to sounds over 80 dBAits just a sentence or so
2. The author mentions that “emergency sirens, motorcycles, chainsaws, construction activities, and other mechanical or amplified noises” fall in the 80 to 120 dBA range. It can be inferred from this statement that these noises
(A) are unwanted, outside intrusions common in urban life irrelevant
(B) can cause hearing loss with constant exposure
(C) are more dangerous to hearing than sounds of the same dBA level from headphonesin this para nthg mentioned about headphone-
(D) are loud enough to cause immediate painnowhere mentioned immediate pain
(E) have no negative impactsmentioned has negative impacts
3. The second paragraph of the passage states “Decibel measurements of noise are therefore often ‘A-weighted’ to take into account the fact that some sound wavelengths are perceived as being particularly loud. A soft whisper is 20 dB, but on the A-weighted scale the whisper is 30 dBA.” Therefore, for any particular sound, the A-weighted decibel level differs from the unweighted decibel level in that
(A) the A-weighted number is 10 points higher than the unweighted numbernot mentioned specifically
(B) the A-weighted number is based on the way the noise is perceived in the human ear. mentioned- perceived as being loud
(C) the unweighted number is always higher than the A-weighted numbernot mentioned. not necessarily true
(D) the A-weighted number is measured by more accurate instrumentsno mention of instruments
(E) only on the unweighted scale does a 10 dB increase in sound equal a ten-fold increase in intensitynt mentioned. 10 fold is about the scale not unweighted or aweightef
