16. Which one would be felt louder: a sound with a SIL of 60dB and a frequency o

Question

16. Which one would be felt louder: a sound with a SIL of 60dB and a frequency of 40Hz or a sound with a SIL of 60dB and a frequency of 100Hz ? a) they both will appear to have the same loudness b) sound with a SIL of 60dB c) sound with a SIL of 60dB and a frequency of 1000Hz d) whichever is sounded first e) cannot say and a frequency of 40 17. What is the SIL beyond which sustained exposure may result in hearing loss (approximately): a) OdB b)-100dB c)200dB d) S0dB e)90dB 18. If two identical instruments are played together, a) the SIL (dB) would be twice of the SIL of one played alone. b) the SIL (dB) would be four times of the SIL of one played alone. c) the intensity of the sound would double due to proportionality d) the intensity of the sound would increase by a factor of four by the square law e) the SIL (dB) would be zero due to destructive interference 19. When two tuning forks (one of them with the frequency 300 Hz) are played simultaneously with a beat frequency of 4 His heard. What is the frequency of the other tuning fork a) 300 Hz or 304 Hz. b) 296 Hz or 304 Hz. c) 298 Hz or 302 Hz. d) 75 Hz or 1200 Hz. e) cannot tell 20. A violin and a piano sound different because they play sounds of different a) amplitudes b) wavelenghs d) phases e) waveshapes

Explanation / Answer

16) Since they both have the same sound intensity level(60 dB), they will both appear to have the same loudness

17) The SIL beyond which sustained exposure may cause hearing loss is 90 dB

18) If 2 identical instruments are playing The intensity will be doubled because of proportionality

19) The frequency of the other tuning fork is

300 + 4 = 304 or 300 - 4 = 296

Hence the other frequency is

296 Hz or 304 Hz

20) A violin and piano sound different because they play sound of different waveshapes

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