SHS 311 TEST QUESTIONS WITH 100% CORRECT ANSWERS
The measured pressure is 632, 451 µPa. Convert to dB SPL. - Answer- 90 dB SPL
The measured sound power level is 6.30 x 10-6 w/m2. Convert to dB IL. - Answer- 68 dB IL
The measured sound power level increased from 4 x 10-5 w/m2 to 8 x 10-5 ...
The measured pressure is 632, 451 µPa. Convert to dB SPL. - Answer- 90 dB SPL
The measured sound power level is 6.30 x 10-6 w/m2. Convert to dB IL. - Answer- 68
dB IL
The measured sound power level increased from 4 x 10-5 w/m2 to 8 x 10-5 w/m2. What
is the increase in dB IL? - Answer- 3
The frequency of a sine wave is 2500 Hz. What is the period? - Answer- 0.4 msec
The wavelength of a 1500 Hz sine wave is 2 feet. What is the speed of sound for the
medium that the sound wave is traveling through? Include units. - Answer- 3000 ft/sec
Threshold is 45 dB SPL at 1000 Hz. What is the threshold in dB HL - Answer- 37.5
dBHL
Threshold is 65 dB SPL at 2000 Hz. What is the threshold in dB HL? - Answer- 56 dB
HL
Threshold is 40 dB HL at 500 Hz. What is the threshold in dB SPL? - Answer- 53.5 dB
SPL
Threshold is 75 dB HL at 4000 Hz. What is the threshold in dB SPL? - Answer- 87 dB
SPL
Threshold is 55 dB HL at a given frequency. What would the presentation level (in HL)
be at 15 dB SL? - Answer- 70 dB HL
Threshold is 35 dB HL at a given frequency. What would the presentation level (in HL)
be at 35 dB SL? - Answer- 70 dB HL
The head shadow effect is present for _______ frequencies. This is because sound will
__________ ____ the head due the __________ wavelengths at these frequencies. -
Answer- - High
- Bounce off
- Shorter
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