Indian Audio Centre, SCO 78-79, Sector 17 C, Above old Punjab & Sind Bank,  Chandigarh 160017 Sandeep kamboj )
Noise and Hearing Loss Basically, noise is unwanted sound.   It is a pollutant and a hazard to human health and hearing. I...
Noise and Hearing Loss <ul><li>Noise in our environment affects physical health.  </li></ul><ul><li>Noise also has psychol...
Noise and Hearing Loss <ul><li>Unfortunately, public awareness of the hazardous effects of noise is low - especially noise...
Noise Levels <ul><li>Both the amount of noise and the length of time you are exposed to the noise determine its ability to...
How noise damages hearing <ul><li>The amount of sound that is capable of producing subsequent hearing loss is related by s...
How much noise exposure is allowed <ul><li>90 db for 8 hours. </li></ul><ul><li>95 db for 4 hours. </li></ul><ul><li>115 d...
Noise induced hearing loss. <ul><li>The majority of noise induced hearing loss occurs due to occupational or industrial ex...
The noise chart <ul><li>Below gives an idea of average decibel levels for everyday sounds around you. </li></ul><ul><li>Pa...
The noise chart <ul><li>Extremely loud: </li></ul><ul><li>110 dB = rock music, model airplane </li></ul><ul><li>106 dB = t...
The noise chart <ul><li>Very loud: </li></ul><ul><li>80 dB = alarm clock, busy street </li></ul><ul><li>70 dB = busy traff...
The noise chart <ul><li>Moderate: </li></ul><ul><li>50 dB = moderate rainfall </li></ul><ul><li>40 dB = quiet room </li></...
Warning Signs of Hazardous Noise <ul><li>You must raise your voice to be heard  </li></ul><ul><li>You can't hear someone t...
Hazardous Noise <ul><li>Sounds louder than 80 decibels are considered potentially dangerous.  </li></ul><ul><li>Both the a...
Examples of noise levels considered dangerous by experts <ul><li>a lawnmower,  </li></ul><ul><li>a rock concert,  </li></u...
Can't my ears &quot;adjust&quot; and  &quot;get used&quot; to regular noise? <ul><li>If you think you have &quot;gotten us...
Physical Changes <ul><li>The most notable physical effect of noise exposure is  loss of hearing  . Noise Induced Hearing L...
Noise affects hearing & other parts of the body and body systems .   <ul><li>It is now known that noise: </li></ul><ul><li...
Noise affects in   other ways   <ul><li>increase fatigue  &  cause irritability   </li></ul><ul><li>effects of noise on be...
Noise affects in   other ways <ul><li>The most important effect of noise  </li></ul><ul><li>in the totality of the effects...
“ 5” phase hearing conservation program for industry:   <ul><li>Noise Monitoring   </li></ul><ul><li>Audiometric (Hearing)...
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Noise and hearing los

  1. 1. Indian Audio Centre, SCO 78-79, Sector 17 C, Above old Punjab & Sind Bank, Chandigarh 160017 Sandeep kamboj )
  2. 2. Noise and Hearing Loss Basically, noise is unwanted sound. It is a pollutant and a hazard to human health and hearing. In fact, it has been described as the most pervasive pollutant in America.
  3. 3. Noise and Hearing Loss <ul><li>Noise in our environment affects physical health. </li></ul><ul><li>Noise also has psychological and social implications and affects our well being and quality of life. </li></ul>
  4. 4. Noise and Hearing Loss <ul><li>Unfortunately, public awareness of the hazardous effects of noise is low - especially noise considered to be non-occupational. </li></ul><ul><li>Fourth Wednesday in April has been declared International Noise Awareness Day (INAD). </li></ul>
  5. 5. Noise Levels <ul><li>Both the amount of noise and the length of time you are exposed to the noise determine its ability to damage your hearing. </li></ul><ul><li>Noise levels are measured in decibels (dB). </li></ul><ul><li>The higher the decibel level, the louder the noise. </li></ul><ul><li>Sounds louder than 80 decibels are considered potentially hazardous. </li></ul><ul><li>Continued exposure to more than 85 decibels (dBA) of noise may cause gradual but permanent damage to hearing. Hearing loss is accelerated by louder noises. </li></ul>
  6. 6. How noise damages hearing <ul><li>The amount of sound that is capable of producing subsequent hearing loss is related by so called damage risk criteria, which is based upon equal energy concept. </li></ul><ul><li>Total Sound energy delivered to the cochlea, i.e. relevant in predicting injury and hearing loss </li></ul>
  7. 7. How much noise exposure is allowed <ul><li>90 db for 8 hours. </li></ul><ul><li>95 db for 4 hours. </li></ul><ul><li>115 db for 15 minutes. </li></ul>
  8. 8. Noise induced hearing loss. <ul><li>The majority of noise induced hearing loss occurs due to occupational or industrial exposure. </li></ul><ul><li>Maximum loss is typically occur after 10 to 15 years of continues exposure </li></ul>
  9. 9. The noise chart <ul><li>Below gives an idea of average decibel levels for everyday sounds around you. </li></ul><ul><li>Painful: </li></ul><ul><li>150 dB = rock music peak </li></ul><ul><li>140 dB = firearms, air raid siren, jet engine </li></ul><ul><li>130 dB = jackhammer </li></ul><ul><li>120 dB = jet plane take-off, amplified rock music at 4-6 ft., car stereo, </li></ul><ul><li>band practice </li></ul>
  10. 10. The noise chart <ul><li>Extremely loud: </li></ul><ul><li>110 dB = rock music, model airplane </li></ul><ul><li>106 dB = timpani and bass drum rolls </li></ul><ul><li>100 dB = snowmobile, chain saw, pneumatic drill </li></ul><ul><li>90 dB = lawnmower, shop tools, truck traffic, subway </li></ul>
  11. 11. The noise chart <ul><li>Very loud: </li></ul><ul><li>80 dB = alarm clock, busy street </li></ul><ul><li>70 dB = busy traffic, vacuum cleaner </li></ul><ul><li>60 dB = conversation, dishwasher </li></ul>
  12. 12. The noise chart <ul><li>Moderate: </li></ul><ul><li>50 dB = moderate rainfall </li></ul><ul><li>40 dB = quiet room </li></ul><ul><li>Faint: </li></ul><ul><li>30 dB = whisper, quiet library </li></ul>
  13. 13. Warning Signs of Hazardous Noise <ul><li>You must raise your voice to be heard </li></ul><ul><li>You can't hear someone two feet away from you </li></ul><ul><li>Speech around you sounds muffled or dull after leaving a noise area </li></ul><ul><li>You have pain or ringing on your ears (tinnitus) after exposure to noise. </li></ul>
  14. 14. Hazardous Noise <ul><li>Sounds louder than 80 decibels are considered potentially dangerous. </li></ul><ul><li>Both the amount of noise and the length of time of exposure determine the amount of damage. </li></ul><ul><li>Hair cells of the inner ear and the hearing nerve can be damaged by an intense brief impulse, like an explosion, or by continuous and/or repeated exposure to noise. </li></ul>
  15. 15. Examples of noise levels considered dangerous by experts <ul><li>a lawnmower, </li></ul><ul><li>a rock concert, </li></ul><ul><li>firearms, </li></ul><ul><li>firecrackers, </li></ul><ul><li>headset listening systems, </li></ul><ul><li>motorcycles, </li></ul><ul><li>tractors, </li></ul><ul><li>household appliances (garbage disposals, blenders, food processors/choppers, etc.) </li></ul><ul><li>and noisy toys. </li></ul>All can deliver sound over 90 decibels and some up to 140 decibels.
  16. 16. Can't my ears &quot;adjust&quot; and &quot;get used&quot; to regular noise? <ul><li>If you think you have &quot;gotten used to&quot; the noise you are routinely exposed to, then most likely you have already suffered damage and have acquired a permanent hearing loss. </li></ul><ul><li>Don't be fooled by thinking your ears are &quot;tough&quot; or that you have the ability to &quot;tune it out&quot;! </li></ul><ul><li>Noise induced hearing loss is usually gradual and painless, but, unfortunately, permanent. </li></ul><ul><li>Once destroyed, the hearing nerve and its sensory nerve cells do not regenerate! </li></ul>
  17. 17. Physical Changes <ul><li>The most notable physical effect of noise exposure is loss of hearing . Noise Induced Hearing Loss (NIHL) affects children, adolescents, young adults, and older adults. </li></ul><ul><li>Because of noise in our society, hearing loss is appearing much earlier in life than would have been expected just 30 years ago. </li></ul>
  18. 18. Noise affects hearing & other parts of the body and body systems . <ul><li>It is now known that noise: </li></ul><ul><li>Disturbs digestion </li></ul><ul><li>Increases blood pressure </li></ul><ul><li>Increases breathing rate </li></ul><ul><li>Can cause an upset stomach or ulcer </li></ul><ul><li>Has negative cardiovascular effects such as changing the way the heart beats </li></ul><ul><li>Can negatively impact a developing fetus, perhaps contributing to premature birth </li></ul><ul><li>Makes it difficult to sleep, even after the noise stops </li></ul><ul><li>Intensifies the effects of factors like drugs, alcohol, aging and carbon monoxide </li></ul>
  19. 19. Noise affects in other ways <ul><li>increase fatigue & cause irritability </li></ul><ul><li>effects of noise on behavior </li></ul><ul><li>makes speech communication harder (More concentration and energy is needed not only to listen and hear over the noise but also to speak louder above the noise) </li></ul><ul><li>voices can become strained and vocal cord abuses, such as laryngitis may develop. </li></ul>
  20. 20. Noise affects in other ways <ul><li>The most important effect of noise </li></ul><ul><li>in the totality of the effects on the human, </li></ul><ul><li>is </li></ul><ul><li>“ PRODUCTIVITY” </li></ul>
  21. 21. “ 5” phase hearing conservation program for industry: <ul><li>Noise Monitoring </li></ul><ul><li>Audiometric (Hearing) Testing </li></ul><ul><li>Employee Training </li></ul><ul><li>Hearing Protectors </li></ul><ul><li>Recordkeeping </li></ul>
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