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(a) What are the loudness in phones of sounds having frequencies of 200, 1000, 5000, and 10,000 Hz, if they are all at the same 60.0-dB sound intensity level? (b) If they are all at 110 dB? (c) If they are all at 20.0 dB?

a)$f = 200 \mathrm { Hz }$ has londness of 50 phones$\mathrm { f } = 1000 \mathrm { Hz }$ lins loudness of 60 phones$\mathrm { f } = 5000 \mathrm { Hz }$ lins loudness of 70$\mathrm { phones }$$\mathrm { f } = 10000 \mathrm { Hz }$ has loudness of 60$\mathrm { phones }$b)$f = 200 \mathrm { Hz }$ has loudness of 110 phones$f = 1000 \mathrm { Hz }$ has loudness of 110 phones$\mathrm { f } = 5000 \mathrm { Hz }$ has loudness of 115 phones$\mathrm { f } = 10000 \mathrm { Hz }$ has loudness of 105 phonesc)$f = 200 \mathrm { Hz }$ has loudness of 0 phones$f = 1000 \mathrm { Hz }$ has loudness of 25 phones$f = 5000 \mathrm { Hz }$ has loudness of 25 phones$\mathrm { f } = 10000 \mathrm { Hz }$ has loudness of 10$\mathrm { phones }$

Physics 101 Mechanics

Chapter 17

Physics of Hearing

Sound and Hearing

Cornell University

Hope College

University of Sheffield

McMaster University

Lectures

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everyone. This is question number 64 from Chapter 17 and this problem were given sounds with frequencies of 201,000. 5000, 10,000 Hertz on were asked to find the loudness and phones. If all of the sounds air at a 60 decibels of sound intensity level, be 100 and 10 decibels and see 20 festivals. This is a basic ah, question that just is helping you practice reading this graph, which is frequency versus intensity. And then that gives you loudness with these lines over here. So 200 hertz at 60 decibels say 200 is down here. Trace it up to 60 and then check that line and that looks like it's at about 51 hurts. 51. Excuse me? 51 phones. Okay. And then we go 2000 hertz at 60 decibels, and that looks to be right at 60. And then we have 5000 hertz at 60. All right? It's in about 58 and then 10,000. Hertz at 60 is right about 47. So a little bit lower. So you just repeat the same process for the 110 decibels and for the um, 20 decibels just practicing reading. So for 110 decibels, we have 108 Whoa. Okay. And 1000 and 110 looks about right at Winton. Okay, next one down. 5000 and 100 and 10. See, that's about 1 18 10,000, 110. You want 05 When the next set. 20 decibels. 200. That is way low. Looks like may be negative for And then the next one, a 1020 Looks like 20 The next 1 5000 and 20 turn to Mamie. And finally 20 decibels. 10,000. And that's right at 10. And there.

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