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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 difference between dB SPL and dB SL?
There are several types of dB. dB SPL are decibels measuring sound pressure levels. There is an accepted reference point of 0 dB SPL which equals 20 micropascals = 2 × 10-5 pascals. dB SL are decibels measuring a signal relative to an individuals auditory threshold. For example, if a person's minimum threshold is 30 dB HL (yet another type of decibel measuring how much worse a person's hearing is based on a referential dB level) and a signal is at 40 dB HL, the sensation level of this signal to this individual is 10 db SL (40 dB - 30 dB = 10 dB SL).
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.
How many times louder is 80dB compared to 40dB?
80 dB is 10 times louder than 70 dB, and 70 dB is 10 times louder than 60 dB, and so on. Therefore, 80 dB is 1000 times louder than 40 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.
How many decibels greater than 1 W is 80 W?
dB = 10 log(power-2/power-1) = 10 log(80) = 19.03 dB
How much greater is the sound pressure level of a 100 dB siren than an 80 dB alarm clock How much louder would most people perceive the siren to be?
The sound pressure level of a 100 dB siren is 100 times greater than that of an 80 dB alarm clock. Most people would perceive the 100 dB siren to be around twice as loud compared to the 80 dB alarm clock due to the logarithmic nature of the decibel scale and human perception of sound intensity.
What is the number of decibels a human being can hear?
The average human can hear sounds ranging from 0 dB (threshold of hearing) to around 120 dB (threshold of pain). However, the range of comfortable hearing is typically between 20-70 dB for most people.
What maximum noise levels are you excluded prior to retest?
80 db
Human capacity to hear sound measured in Hertz?
measeured in desibel 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.
What is the DB level of ultra sonic sound?
Ultrasonic sound refers to sound waves with frequencies above the human hearing range, typically above 20 kHz. The decibel (dB) level of ultrasonic sound can vary significantly depending on the source, but it is often measured in the range of 80 dB to over 120 dB. However, since humans cannot hear ultrasonic frequencies, their impact is typically evaluated in terms of their effects on materials or biological systems rather than their perceived loudness.
