Output Levels of Commercially Available Portable Compact Disc Players and the Potential Risk to Hearing

@article{Fligor2004OutputLO,
  title={Output Levels of Commercially Available Portable Compact Disc Players and the Potential Risk to Hearing},
  author={Brian J. Fligor and L. Clarke Cox},
  journal={Ear and Hearing},
  year={2004},
  volume={25},
  pages={513-527}
}
Objective: To measure the sound levels generated by the headphones of commercially available portable compact disc players and provide hearing healthcare providers with safety guidelines based on a theoretical noise dose model. Design: Using a Knowles Electronics Manikin for Acoustical Research and a personal computer, output levels across volume control settings were recorded from headphones driven by a standard signal (white noise) and compared with output levels from music samples of eight… 
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References

SHOWING 1-10 OF 39 REFERENCES
Noise-induced hearing loss and portable radios with headphones.
TLDR
The results suggest that portable radios with headphones may be capable of causing permanent hearing loss in a large proportion of radio users.
Sound levels from personal cassette players.
TLDR
Comparison with damage risk criteria indicates that 5% of the sample are listening in such a manner that habitual use would constitute a damage risk to hearing.
Transient Sensorineural Hearing Loss after Overuse of Portable Headphone Cassette Radios
TLDR
As expected, transient shifts frequently occur with recreational use, and recreational warnings and standards should be established.
Personal cassette players ('Walkman'). Do they cause noise-induced hearing loss?
TLDR
It is concluded that the risk of acquiring permanent noise-induced hearing loss (NIHL) from use of PCP is very small for what is found to be normal listening conditions.
Maximum Available Sound‐Pressure Levels from Stereo Components
TLDR
It was concluded that popular stereo components can be potentially dangerous to the hearing mechanism if operated at or near maximum power output.
Epidemiological evaluation of hearing damage related to strongly amplified music (personal cassette players, discotheques, rock concerts)--high-definition audiometric survey on 1364 subjects.
  • C. Meyer-Bisch
  • Psychology, Medicine
    Audiology : official organ of the International Society of Audiology
  • 1996
TLDR
Measures to conserve young people's hearing must include a reduction of sound levels, the education of music and entertainment professionals, and making PCP users better informed.
Hearing: The Effects of Noise
  • W. W. Clark
  • Medicine
    Otolaryngology--head and neck surgery : official journal of American Academy of Otolaryngology-Head and Neck Surgery
  • 1992
TLDR
The most important sources of nonoccupational noise exposure are hunting and target shooting, listening to amplified music through headphones, and attendance at rock concerts, where an assessment of risk of hearing loss is made.
Hearing loss due to partly impulsive industrial noise exposure at levels between 87 and 90 dB(A).
TLDR
Results reveal significant hearing loss after 9 years of exposure, greater than that from quasisteady noise exposure with the same equivalent continuous A-weighted sound-pressure level.
Pup Music and Hearing
TLDR
Temporary threshold shift measurements showed that musicians were more resistant to pop music noise than the audience and that female listenerswere more resistant than male listeners, leaving many interesting questions concerning the relationship between noise and hearing loss.
Individual Susceptibility to Noise‐Induced Hearing loss: An Old Topic Revisited
TLDR
A review of the role of acoustic reflex effectiveness, cochlear efferent function, and history of noise exposure provide a perspective for future strategies in predicting susceptibility to noiseinduced hearing loss.
...
1
2
3
4
...