While 20 to 20,000Hz forms the absolute borders of the human hearing range, our hearing is most sensitive in the 2000 - 5000 Hz frequency range.
' Ear plugs — such as the type swimmers use to block water — would be a good idea to protect Maria's hearing. As for the sounds of young children shouting and crying, babies can cry at around 110 decibels, and may be more damaging than other types of 110 decibel sound, as Dr Backus explains.
A whisper is between 20-30 dB. On the other hand, a human scream can reach decibel levels between 80 and 125 dB. The relative loudness of human speech and the different decibel levels a human can speak at depends on several factors.
The threshold of hearing is generally reported in reference to the RMS sound pressure of 20 micropascals, i.e. 0 dB SPL, corresponding to a sound intensity of 0.98 pW/m2 at 1 atmosphere and 25 °C. It is approximately the quietest sound a young human with undamaged hearing can detect at 1,000 Hz.
Certain high-pitched consonants like “f,” “s” and “th” (4,000-5,000 Hz) also might get missed, causing speech to sound muffled or garbled.
Human ear perceives frequencies between 20 Hz (lowest pitch) to 20 kHz (highest pitch). All sounds below 20 Hz are qualified as infrasounds, althought some animals (ex. mole-rat, or elephant) are hearing them.
Scraping the surface
In 2012, a study of 13 volunteers at Newcastle University, ranked the unpleasantness of different sounds. The study showed higher frequency sounds to be the most unpleasant. The very worst? A knife scraping against a bottle.
The Krakatoa volcanic eruption: Not only did it cause serious damage to the island, the eruption of Krakatoa in 1883 created the loudest sound ever reported at 180 dB. It was so loud it was heard 3,000 miles (5,000 km) away. 3. A 1-Ton TNT Bomb: An explosion from this bomb would measure 210 dB.
Flexi Says: The loudest sound ever made by humans was the detonation of the Tsar Bomba, a nuclear bomb created and detonated by the Soviet Union in 1961.
People of All ages without a hearing impairment should be able to hear the 8000hz. People under 50 should be able to hear the 12,000hz and people under 40, the 15,000hz. Under 30s should hear the 16,000hz, and the 17,000hz is receivable for those under 24.
So, for 10000 Hz , we can see that the corresponding loudness is between 65 dB and 70 dB. Therefore our answer is 66 dB (approx.)
Above 20000Hz we can't hear anything.
For Adults. As explained above, it would be almost impossible to create a 1 dB environment outside of scientific labs. However, adults with optimal hearing health will be able to perceive a 1 dB difference in sounds.
(Hertz is a measure of the frequency of a sound, and the higher the frequency, the higher pitched the sound.) Dogs, on the other hand, can hear sounds as high as 47,000 to 65,000 Hz. These are sounds far too high-pitched for us.
The loudness of a sound that a person can withstand without discomfort is about. 80 dB.
A gunshot is typically around 140 to 190 decibels. In comparison, a jet taking off is approximately 150 decibels. Decibels measure the intensity of sound.
Audio devices and mobile phones including iPhone have a sound level of 100 dB or louder. iPhones can produce a maximum of 115 decibels (software limits European iPods to 100 dB; U.S. models have been measured higher), the equivalent of attending a rock concert amplification.
The outside of aircraft engines (around 140 dB at takeoff) and conditions on other aircraft may have higher or lower noise levels.