What type of hearing protectors are not suitable for dirty hands? - Essentially anything that requires
you to touch the earplug is not ideal for dirty hands such as sponge or foam roll down earplugs.
What frequencies are affected by cerumen impacted or waxy ear canals? - All frequencies,
but ESP...
What type of hearing protectors are not suitable for dirty hands? - ✔✔Essentially anything that requires
you to touch the earplug is not ideal for dirty hands such as sponge or foam roll down earplugs.
What frequencies are affected by cerumen impacted or waxy ear canals? - ✔✔All frequencies,
but ESPECIALLY between 500-1000 HZ
How many hours should an employee who has a STS be noise free before giving them a retest? -
✔✔14 hours (much like the baseline)
In the general population, what is the most frequently reported type of loss? - ✔✔Presbycusis
Number that is added when two identical sources are operating at the same time. - ✔✔3dB
Example: 90dB + 90dB doesn't equal 180 dB in loudness, rather 93 dB in loudness.
If you are unable to communicate at this distance, then it is likely that you are in a hearing
hazardous environment. - ✔✔3 feet
Number that is added to determine how much protection an employee receives from wearing dual
protection. (It is always added to the higher attenuating protector.) - ✔✔5dB
Example: 28 dB earplugs + 25 dB earmuffs = 33 dB of attenuation.
During hearing testing, if you cannot hear the tones, you increase in __ dB steps. - ✔✔5
, Another 5dB use would be the _____ _____ or _____ _____. Every time the sounds level increases by
5dB, the amount of time exposed is cut in half but the dose doubles. - ✔✔5dB Exchange or
Doubling Rate
When an OHC needs to be recertified. - ✔✔Every 5 years
How many months to get an employee's baseline if you have an onsite program and clinic. -
✔✔6 months
Number to use to convert attenuation rating of hearing protection from the C-scale to the A-scale. -
✔✔7 dB
Examble: NRR-7 or 28NRR - 7 dB = 21 dBA of attenuation.
Number that reflects significant change in hearing. If an employee has an average change in hearing of
___ dB or more when baseline is compared to annual test, then they have a STS. - ✔✔10 dB
Another use of 10 dB - ✔✔Unacceptable range in daily calibration, 5 dB is okay.
During hearing testing, if an employee hears the test tones, you decrease in ___ dB steps. If the
tones are not heard, they are increased in ___ dB steps. - ✔✔10; 5
How many months to get an employee's baseline if you use a mobile van service provider? -
✔✔12 months
The amount of hours a person must avoid hazardous noise before a baseline or retest. - ✔✔14 hours
The number of days an employer has to inform an employee that they have experienced a shift in
hearing from when the employer was performed. - ✔✔21 days
Normal hearing levels - ✔✔0-25 dB
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