NOISE POLLUTION environmental health

SOUND Sound we hear is produced in sound waves Sound Waves: are vibrations or movements of air Different types of sound waves produces sounds at different pitches Pitch: is the highness or lowness of sound

SOUND – cont. Some sounds have a high pitch: wistle Some sounds have a low pitch: car Sounds have different Amplitudes Amplitudes: is the loudness of a sound Decible (dB): is the unit of measurement for sound 70 dB’s pollutes the environment

Noise Pollution Noise Pollution: is the loud or constant noise that causes hearing loss, stress, fatigue, irritability and tension. – Adds to stress – Body responds as a threat – Prolonged exposure causes ulcers, headaches, and high blood pressure – Sleeplessness – Increased irritability – Violent reactions

Noise Pollution Can also cause accidents due to the inability to hear a warning OSHA claims that daily exposure for 8hrs or more to noise levels of 85 dBs will result in hearing loss. Below 85 dB can cause damage, but just takes a little bit longer

Noise Pollution - Injuries TTS (Temporary Threshold Shift): Temporary hearing loss of certain frequencies Noise-Induced Permanent Threshold Shift: A permanent loss of the ability to ehar certain frequencies Tinnitus: Is a ringing, buzzing, or hissing sensations that can reach levels of 70 dBs

Noise Pollution SOUNDdBsSOUNDdBs Vacuum85Jackhammer120 Power Lawnmower85Earphones on loud125 Motorcycle90Music130 Chain Saw100Rivet Gun130 Garbage Truck100Jet Engine135 Car Stereo115Gun Shot140 Noise that can cause permanent hearing loss after 8 hours Noise that can cause immediate and permanent hearing loss

When its too loud!!!! If you have to raise your voice You cannot hear someone 2 ft away You experience pain or ringing in ears You feel unsteady, dizzy or nauseated Sounds are muffled when sound stops Other people can hear your headset