Sound Level Research

Threshold of hearing: The standard threshold is taken to be at 0dB but the measured human threshold of hearing is 1000Hz which is 4dB. The maximum sensitivity is around 3500 to 4000Hz.

Hyperphysics.phy-astr.gsu.edu. (2019). Features of Equal Loudness Curves. [online] Available at: http://hyperphysics.phy-astr.gsu.edu/hbase/Sound/earcrv.html [Accessed 4 Oct. 2019].

Threshold of Pain and Discomfort: Sounds above 90dB can cause hearing damage if someone is exposed to it every day. If the sound level is above 130dB it starts to hurt because 130dB is the threshold of pain. If it is above 110dB it surpassess the threshold or discomfort.

hearing, H. (2019). Hearing loss and deafness: Normal hearing and impaired hearing. [online] Ncbi.nlm.nih.gov. Available at: https://www.ncbi.nlm.nih.gov/books/NBK390300/ [Accessed 4 Oct. 2019].

Loudest Recorded Sound: The loudest recorded sound was recorded on the 27th of August 1883. It was created from a volcanic eruption from the island of Krakatoa in Indonesia. It could be heard clearly almost 3,100 miles away by people from 50 different locations around the world. It was recorded at around 170dB over 100 miles away.

Crew, B. (2019). The World's Loudest Sound Caused Shock Waves 10,000 Times That of a Hydrogen Bomb. [online] ScienceAlert. Available at: https://www.sciencealert.com/worlds-loudest-sound-krakatoa-shock-waves-10000-more-hydrogen-bomb [Accessed 4 Oct. 2019].

Koerth-Baker, M. (2019). The Loudest Sound In The World Would Kill You On The Spot. [online] FiveThirtyEight. Available at: https://fivethirtyeight.com/features/the-loudest-sound-in-the-world-would-kill-you-on-the-spot/ [Accessed 4 Oct. 2019].