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How far would you have to be to get a reading of 60 dB when standing outside 15 m away from a boombox the intensity level was measured at 80 db?
A reduction of 20 dB corresponds to increasing the distance from the sourceby a factor of 10.So you have to back off to 150 meters in order to reduce the sound level to 60 dB.
A noisy class room has a sound level of 80 dB what is the intensity of sound?
80 dB is equivalent to 108 times the threshold of hearing. Usually 10 decibel will be the virtual silence. 80 dB will be equivalent to door slamming.
What is the softest sound in the world?
20,000 Hz (20kHz) is the (ideal) highest FREQUENCY that a healthy human ear can hear. With regard to loud sounds, a sound LEVEL of 120 decibel (dB) causes pain, and a level of 140 dB causes deafness.
How far away can you hear a motorway?
For many vehicles, the road contact noise will be larger than the noise from engine or exhaust. Even inside the vehicle, the noise level will vary from 70db or so for a noisy car, down to 40dB for a quality car. Outside the car, the sound level should not be greater than 80 dB at say 3m. It varies widely with type of engine, type of car, and speed.
What is the normal rang for hearing?
For frequency ranges, we can hear from 20 Hz to 20000 Hz (20 kHz). This is due to a limit on the length of our cochlear basalar membrane. If it were longer, we may be able to hear a greater range. For loudness, using a standard pressure level (SPL) absolute value system, we can hear at soft as 20 dB SPL (just audible whisper) to about 120-140 dB SPL (which will begin to cause hearing loss and irreversible damage).
How far away can you hear 50 db?
its as loud as you talking at normal volume
How far would you have to be to get a reading of 60 dB when standing outside 15 m away from a boombox the intensity level was measured at 80 db?
A reduction of 20 dB corresponds to increasing the distance from the sourceby a factor of 10.So you have to back off to 150 meters in order to reduce the sound level to 60 dB.
How much dB you can hear by your ears?
You can start to hear at the threshold of hearing at 0 dB and end up at the threshold of pain at 137.5 dB.
What decibel range can a human hear in?
We can hear from 0 dB, that is the threshold of hearing up to 130 dB that is the threshold of pain.
A noisy class room has a sound level of 80 dB what is the intensity of sound?
80 dB is equivalent to 108 times the threshold of hearing. Usually 10 decibel will be the virtual silence. 80 dB will be equivalent to door slamming.
How many decibels greater than 1 W is 80 W?
dB = 10 log(power-2/power-1) = 10 log(80) = 19.03 dB
What maximum noise levels are you excluded prior to retest?
80 db
Human capacity to hear sound measured in Hertz?
measeured in desibel dB
A band plays music at 60 dB and then changes to a rock song at 80 dB How many times louder is the rock song?
I tried.. but failed .^_^
What is the softest sound in the world?
20,000 Hz (20kHz) is the (ideal) highest FREQUENCY that a healthy human ear can hear. With regard to loud sounds, a sound LEVEL of 120 decibel (dB) causes pain, and a level of 140 dB causes deafness.
Different sources of noise and their corresponding measurement of loudness in dB?
Leaves rustling produces about 10 dB of noise. A chainsaw, when one yard away is around 110 dB of noise. Normal human conversation is around 60 dB.
What is the loudest sound a human can hear?
20,000 Hz (20kHz) is the (ideal) highest FREQUENCY that a healthy human ear can hear. With regard to loud sounds, a sound LEVEL of 120 decibel (dB) causes pain, and a level of 140 dB causes deafness.
