Hearing Conservations Exam 2
For individuals that work in environments with high levels of noise where there are no hearing
conservation programs, what is recommended they do on their own? - Answer-Obtain an annual
hearing test, preferably one that includes an audiogram, OAEs and a hearing in noise test
Beyond obtaining an annual hearing test, what is suggested for those that work in environments with
high levels of noise where there are no hearing conservation programs? - Answer-Track their
audiometrical changes over time
Besides obtaining annual audiograms and tracking their hearing, what else is suggested for managing
personal hearing conservations? - Answer-Wearing adequate hearing protection
Earplugs with relatively high noise reduction (NRRs) will offer... - Answer-More protection
Standard hearing protection will reduce... - Answer-High frequency information
High-fidelity ear plugs sounds much more _______ and are recommended for listening to _______ -
Answer-Sound much more natural and are recommended for listening to music
It is recommended to reduce your exposure to what as another method of managing your own hearing
conservation? - Answer-Reduce your exposure to high levels of sound
,True or False: Not all changes in hearing ability are due to exposure to high-level of sound - Answer-
True, some may be due to disorders that are treatable and some may be due to a potentially life-
threatening condition
Because of ______ ________ ____________, sound levels at the eardrum will be higher than those
measured outside of the ear. - Answer-Ear canal resonance
True or False: Sound levels may be measured near the ear drum for hearing conservation programs -
Answer-False, they must be measured outside of the ear canal for hearing conservation programs
According to Berger, reporting "eardrum" or coupler SPLs can substantially ____________ the hazard of
sounds, such as music, that contain substantially high-frequency control - Answer-Overestimate
Berger recommends measuring ear canal levels in ____ and then subtracting _____ values, frequency by
frequency, from the eardrum equivalent values that were recorded. If not, the estimate of the true
noise risk may be overestimated by __ to __ dB - Answer-Berger recommends measuring ear canal
levels in dBA and then subtracting HRTF values, frequency by frequency, from the eardrum equivalent
values that were recorded. If not, the estimate of the true noise risk may be overestimated by 4 to 8 dB
True or False: Individuals should not listen to high level output from a MP3 player for long periods of
time - Answer-True
What are some questions to ask when selecting hearing protection? - Answer--What is the activity?
-How much attenuation is needed?
-What frequencies are attenuated?
-Do they adequately fit your ears?
-Are they comfortable and easy to use?
, True or False: A flat attenuation earplug is better when listening to music - Answer-True
What is the term for the single-number rating which is required by law to be shown on the label of a
HPD in the US? - Answer-Noise Reduction Rating (NRR)
The required formula used to determine NRR includes an adjustment for individual _______ and for
those persons who do not wear _______ _________ as instructed. - Answer-The required formula used
to determine NRR includes an adjustment for individual variability and for those persons who do not
wear ear protection as instructed.
True or False: NRR is computed from laboratory data that are not representative of the values attained
in the real world by actual users - Answer-True
In an environment where sound levels are at 115 dBA, the max exposure time is ____ seconds according
to NIOSH; however, an earplug with 15 dB of attenuation will bring the level down to ___ dBA in the ear
canal which the max exposure time limit is ____ minutes - Answer-28 seconds; 100 dBA & 15 minutes
The greater the attenuation, the _____ time you have for exposure - Answer-Greater attenuation =
greater exposure time
When properly inserted in the ear canal, foam plugs may have a _____ attenuation rating,
approximately __-__ dB NRR - Answer-High attenuation; 27-33 dB NRR
A shallow insertion of foam earplugs will result in greater attenuation in the ______ vs the _____
frequencies - Answer-High frequencies vs. the low frequencies
A very deep insertion may result in an essentially ____ attenuation - Answer-Flat attenuation (greater
attenuation)
For individuals that work in environments with high levels of noise where there are no hearing
conservation programs, what is recommended they do on their own? - Answer-Obtain an annual
hearing test, preferably one that includes an audiogram, OAEs and a hearing in noise test
Beyond obtaining an annual hearing test, what is suggested for those that work in environments with
high levels of noise where there are no hearing conservation programs? - Answer-Track their
audiometrical changes over time
Besides obtaining annual audiograms and tracking their hearing, what else is suggested for managing
personal hearing conservations? - Answer-Wearing adequate hearing protection
Earplugs with relatively high noise reduction (NRRs) will offer... - Answer-More protection
Standard hearing protection will reduce... - Answer-High frequency information
High-fidelity ear plugs sounds much more _______ and are recommended for listening to _______ -
Answer-Sound much more natural and are recommended for listening to music
It is recommended to reduce your exposure to what as another method of managing your own hearing
conservation? - Answer-Reduce your exposure to high levels of sound
,True or False: Not all changes in hearing ability are due to exposure to high-level of sound - Answer-
True, some may be due to disorders that are treatable and some may be due to a potentially life-
threatening condition
Because of ______ ________ ____________, sound levels at the eardrum will be higher than those
measured outside of the ear. - Answer-Ear canal resonance
True or False: Sound levels may be measured near the ear drum for hearing conservation programs -
Answer-False, they must be measured outside of the ear canal for hearing conservation programs
According to Berger, reporting "eardrum" or coupler SPLs can substantially ____________ the hazard of
sounds, such as music, that contain substantially high-frequency control - Answer-Overestimate
Berger recommends measuring ear canal levels in ____ and then subtracting _____ values, frequency by
frequency, from the eardrum equivalent values that were recorded. If not, the estimate of the true
noise risk may be overestimated by __ to __ dB - Answer-Berger recommends measuring ear canal
levels in dBA and then subtracting HRTF values, frequency by frequency, from the eardrum equivalent
values that were recorded. If not, the estimate of the true noise risk may be overestimated by 4 to 8 dB
True or False: Individuals should not listen to high level output from a MP3 player for long periods of
time - Answer-True
What are some questions to ask when selecting hearing protection? - Answer--What is the activity?
-How much attenuation is needed?
-What frequencies are attenuated?
-Do they adequately fit your ears?
-Are they comfortable and easy to use?
, True or False: A flat attenuation earplug is better when listening to music - Answer-True
What is the term for the single-number rating which is required by law to be shown on the label of a
HPD in the US? - Answer-Noise Reduction Rating (NRR)
The required formula used to determine NRR includes an adjustment for individual _______ and for
those persons who do not wear _______ _________ as instructed. - Answer-The required formula used
to determine NRR includes an adjustment for individual variability and for those persons who do not
wear ear protection as instructed.
True or False: NRR is computed from laboratory data that are not representative of the values attained
in the real world by actual users - Answer-True
In an environment where sound levels are at 115 dBA, the max exposure time is ____ seconds according
to NIOSH; however, an earplug with 15 dB of attenuation will bring the level down to ___ dBA in the ear
canal which the max exposure time limit is ____ minutes - Answer-28 seconds; 100 dBA & 15 minutes
The greater the attenuation, the _____ time you have for exposure - Answer-Greater attenuation =
greater exposure time
When properly inserted in the ear canal, foam plugs may have a _____ attenuation rating,
approximately __-__ dB NRR - Answer-High attenuation; 27-33 dB NRR
A shallow insertion of foam earplugs will result in greater attenuation in the ______ vs the _____
frequencies - Answer-High frequencies vs. the low frequencies
A very deep insertion may result in an essentially ____ attenuation - Answer-Flat attenuation (greater
attenuation)
