1. Calculate the wave (b) 1 kHz, (c) 10 kHz. length of a sound of frequency (a) 250 Hz,
1. Calculate the wave (b) 1 kHz, (c) 10 kHz. length of a sound of frequency (a) 250 Hz,
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100%
![Instruction: Complete all questions
[Note : P,
= 20 µPa; Ier = 10"12 Watt/m2; We = 10-12 Watt]
ref
ref
ref
Each question carried 10%.
1. Calculate the wave length of a sound of frequency (a) 250 Hz,
(b) 1 kHz, (c) 10 kHz.
2. Calculate the root mean square pressure of a sound wave of 1
kHz with maximum pressure of 100,000 µPa.
3. Calculate the Sound Pressure Level and Sound Intensity Level
for a sound pressure of (a) 20 µPa, (b) 10,000 µPa.
4. Three sounds from different sources are to be combined.
Determine the total sound pressure level (SPL). The four
SPL, are (a) 105 dB, (b) 102 dB and (c) 102 dB.
S,
5.
If two sound sources have equal pressure of 20,000 µPa,
determine the total SPL in dB.
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Transcribed Image Text:Instruction: Complete all questions
[Note : P,
= 20 µPa; Ier = 10"12 Watt/m2; We = 10-12 Watt]
ref
ref
ref
Each question carried 10%.
1. Calculate the wave length of a sound of frequency (a) 250 Hz,
(b) 1 kHz, (c) 10 kHz.
2. Calculate the root mean square pressure of a sound wave of 1
kHz with maximum pressure of 100,000 µPa.
3. Calculate the Sound Pressure Level and Sound Intensity Level
for a sound pressure of (a) 20 µPa, (b) 10,000 µPa.
4. Three sounds from different sources are to be combined.
Determine the total sound pressure level (SPL). The four
SPL, are (a) 105 dB, (b) 102 dB and (c) 102 dB.
S,
5.
If two sound sources have equal pressure of 20,000 µPa,
determine the total SPL in dB.
1
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