[DOC] [TLE] Noise Induced Hearing Loss | American Hearing Research ... [PAR] Both of these affect the degree to which sound (noise) damages hearing. ... Thus, 
20 decibels is 10 times the intensity of 0 decibels, and 40 decibels is 100 times 
as ... the actual physical quantification of sound use units of sound pressure level 
... Habitual exposure to noise above 85 dB will cause a gradual hearing loss in a
... [DOC] [TLE] The Components of Sound - NDE/NDT Resource Center [PAR] The differences between sounds are caused by intensity, pitch, and tone. 
Intensity. Sound is a ... A whisper is about 10 decibels while thunder is 100 
decibels. Listening to ... If a noise is loud enough, over 120 decibels, it can be 
painful to listen to. One hundred ... You can hear a difference between these two 
sounds. That is... [DOC] [TLE] Noise - Basic Information : OSH Answers [PAR] In either case, it can be hazardous to a person's hearing if the sound is loud and 
if he or ... When an object vibrates, it causes slight changes in air pressure. ... 
These pressure variations travel through the air as sound waves (Figure 1). .... 
The use of dB unit makes it easy to deal with the workplace noise level data 
provided... [DOC] [TLE] Sounds you can't hear can still hurt your ears | Science | AAAS [PAR] Sep 30, 2014 ... Listening to just 90 seconds of low-frequency sound can change the way ... to 
loud noises within the audible range have long been known to cause ... Even 
though they're above the lower limit of 20 Hz, these low-frequency sounds .... 
resonances which easily can amplify the LFN by 20dB (= factor 100 lin)). [DOC] [TLE] Too Loud. Too Long. | Noisy Planet [PAR] The louder the sound, the more damage it can cause to your hearing, and the 
quicker this damage will occur. Sound is measured in units called decibels. ... 
Limit your exposure to sounds at or above 100 decibels to no more than 15 
minutes,... [DOC] [TLE] Noise-Induced Hearing Loss | NIDCD [PAR] These sounds can damage sensitive structures in the inner ear and cause ... 
Sound is measured in units called decibels. Sounds of ... However, long or 
repeated exposure to sounds at or above 85 decibels can cause hearing loss. .... 
Many sources of noise can damage kids' hearing, but noise-induced hearing loss 
is 100%... [DOC] [TLE] Lecture 6: Noise - jhsph ocw [PAR] these materials permitted only in accordance with license rights granted. 
Materials ... and/or hearing loss (can be from ... Sound pressure is a surrogate for 
... Pressure = force per unit of area.  Units.  Newtons per square meter (N/m. 2. 
) .... level.  T = the time allowed to be exposed at each dB level. 100. Dose %. 
2. 2. [DOC] [TLE] Dangerous Decibels  Noise Induced Hearing Loss [PAR] NIHL can be caused by a one-time exposure to loud sound as well as by 
repeated ... These cells respond to mechanical sound vibrations by sending an 
electrical signal to the auditory nerve. ... Sound pressure is measured in decibels 
(dB). ... can reach a level of over 100 dBA, loud enough to begin causing 
permanent... [DOC] [TLE] Dangerous Decibels  FAQ [PAR] What sounds cause noise-induced hearing loss (NIHL)? ... MP3  Is there any 
info that indicates how loud these devices actually are? ... ears is a common and 
easily treatable cause of deafness, discomfort, and sometimes noises in your 
ears (tinnitus). .... Know which noises can cause damage (those above 85 
decibels). [DOC] [TLE] The Human Ear - Hearing, Sound Intensity and Loudness Levels [PAR] The human ear responds to disturbances/temporal variations in pressure. ... 
Pinpoint accuracy for 3-D localization of sounds in the f ~ 100 Hz  ~ 1.5 ..... 
these frequencies. ... both tones, as shown in figures (b) and (c), leading to many

Question: Sounds can cause discomfort above about 100 of these units
Answer: decibels