The most well-know damage noise is hearing loss but there are other harmful effect if it is considered the frequency and time of exposure.
Following effect are classified in order to increasing order:
- Annoyance: it is an alarm effect for more sensible people who complain an interference with their activities.
- Interference: it is an alarm effect that forewarns possible damage effect, there are reversible and concrete phenomenon.
- Damage: irreversible and concrete effect.
Noise can react on other organs, for example:
- Endocrine system
- Central nervous system
- Psyche and behaviour
- Cardiovascular system
- Gastrointestinal system
- Respiratory system,…
People, if exposed to noise, feel interference and discomfort around 50 dB(A).
If noise increase its value, some people more sensible than other, can become irritable and aggressive. If noise exceed 80 dB(A),it makes interference with verbal communication and listening ability of safety acoustic signals. This can increase the probability of an injury in workplace and increase mental stress reducing production efficiency.