title: Extended high frequency audiometry in users of personal listening devices.
abstract: OBJECTIVE
  Noise exposure leads to high frequency hearing loss. Use of Personal Listening Devices may lead to decline in high frequency hearing sensitivity because of prolonged exposure to these devices at high volume. This study explores the changes in hearing thresholds by Extended High Frequency audiometry in users of personal listening devices.
  
  
  METHODS
  A descriptive, hospital based observational study was performed with total 100 subjects in age group of 15-30years. Subjects were divided in two groups consisting of 30 subjects (Group A) with no history of Personal Listening Devices use and (Group B) having 70 subjects with history of use of Personal Listening Devices. Conventional pure tone audiometry with extended high frequency audiometry was performed in all the subjects.
  
  
  RESULTS
  Significant differences in hearing thresholds of Personal Listening Device users were seen at high frequencies (3kHz, 4kHz and 6kHz) and extended high frequencies (9kHz, 10kHz, 11kHz, 13kHz, 14kHz, 15kHz and 16kHz) with p value <0.05. Elevated hearing thresholds were observed in personal listening devices users which were directly proportional to volume and duration of usage.
  
  
  CONCLUSIONS
  In present study no significant changes were noted in hearing thresholds in PLD users before 5years of PLD use. However, hearing thresholds were significantly increased at 3kHz, 10kHz, 13kHz in PLD users having >5years usage at high volume. Thus, it can be reasonably concluded that extended high frequencies can be used for early detection of NIHL in PLD users.
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Lady Hardinge Medical College & Associated Hospitals, New Delhi, India. Electronic address: poornima204@gmail.com.
authors.forename: Poornima
authors.initials: P
authors.lastname: Kumar
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Lady Hardinge Medical College & Associated Hospitals, New Delhi, India.
authors.forename: Prabhakar
authors.initials: P
authors.lastname: Upadhyay
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, PGIMER & Dr RML Hospital, New Delhi, India.
authors.forename: Ashok
authors.initials: A
authors.lastname: Kumar
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Lady Hardinge Medical College & Associated Hospitals, New Delhi, India.
authors.forename: Sunil
authors.initials: S
authors.lastname: Kumar
authors.affiliation: Department of Otorhinolaryngology-Head & Neck Surgery, Lady Hardinge Medical College & Associated Hospitals, New Delhi, India.
authors.forename: Gautam Bir
authors.initials: GB
authors.lastname: Singh
mesh_terms: D000293:Adolescent; D000328:Adult; D001301:Audiometry, Pure-Tone; D001309:Auditory Threshold; D040421:Cell Phone; D034201:Computers, Handheld; D005260:Female; D006317:Hearing Loss, Noise-Induced / Q000175:diagnosis* / Q000209:etiology*; D006801:Humans; D055539:MP3-Player; D008297:Male