What is noise level? What is the maximum intensity that humans can hear in dB?
1 What is noise level? Loudness is the sound intensity level of noise, measured in units of dB (decibels) . Noise is unwanted , annoying sound to the listener. Sound emitted by factories, vehicles, engines, airplanes or household appliances such as: ,, ,… is considered noise. In other words, sound that has no value emitted from the surrounding environment or a good sound but emitted at the wrong time , does not match the listener's wishes is also called noise. 2 Effect of noise level Every day, if we are regularly exposed to many loud sound sources, it will greatly affect the process of working, resting as well as health. Hearing effects: Some sources of noise can exceed the safe hearing threshold of the ear such as drills, horns, engines, airplanes, etc. Frequent exposure to these types of sounds will cause damage to hearing. tympanic membrane, hearing loss, decreased sensitivity to sound of the ear. Nervous effects: Sound with high intensity can affec...