4. An alarm, behaving as a point source of sound, emits a piercing 13.5 kHz tone at a power of 109 Watts. It is designed to produce ear-splitting pain that will cause an escaping burglar to immediately collapse to the ground. If a particular burglar's threshold of pain occurs at a sound intensity level of 121 dB, how far away must the burglar be for his hearing to be right at the threshold of pain?
4. An alarm, behaving as a point source of sound, emits a piercing 13.5 kHz tone at a power of 109 Watts. It is designed to produce ear-splitting pain that will cause an escaping burglar to immediately collapse to the ground. If a particular burglar's threshold of pain occurs at a sound intensity level of 121 dB, how far away must the burglar be for his hearing to be right at the threshold of pain?
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Transcribed Image Text:4. An alarm, behaving as a point source of sound, emits a piercing 13.5 kHz tone at a power of 109 Watts. It is
designed to produce ear-splitting pain that will cause an escaping burglar to immediately collapse to the ground.
If a particular burglar's threshold of pain occurs at a sound intensity level of 121 dB, how far away must the
burglar be for his hearing to be right at the threshold of pain?
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