Normative data of extended high frequency audiometry in normal hearing subjects with different aged groups

Status

Active, not recruiting

Phases

Unknown

Study type

Observational

Source

TCTR

Registry ID

TCTR20230923002

Enrollment

134

Registered

2023-09-23

Start date

2023-11-13

Completion date

Unknown

Last updated

2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Normal hearing at frequency range 250-8000 Hz in age 18-60 years Normal hearing at frequency range 250-4000 Hz in age 61-70 years. Normative data Extended high frequency audiometry Normal hearing subjects Different aged groups

Interventions

1. Normal hearing at frequency range 250-8000 Hz in age 18-60 years 2. Normal hearing at frequency range 250-4000 Hz in age 61-70 years.

Diagnostic

Normal hearing population

Eligibility

Sex/Gender

All

Age

18 Years to 70 Years

Inclusion criteria

Inclusion criteria: 1. Thai population age 18-70 years 2. No hearing problems and communication disorders 3. No history middle ear diseases, dysfunction and surgery 4. No subjective tinnitus

Exclusion criteria

Exclusion criteria: 1. Receiving chemotherapy (platinum based) and ototoxicity (aminoglycosides) 2. Occupational noise for more than 1 year 3. Family history about congenital hearing loss 4. Systemic diseases 5. Stroke, Chronic kidney disease and thalassemia with iron chelation 6. Have been diagnosed with diabetes millitus for more than 5 years 7. Have been diagnosed with hypertension for more than 3 years or less than 3 years but cannot control systolic <140 mmHg and diastolic < 90 mmHg 8. Smoking more than 15 packs of cigarettes per year and/or continuous smoking for more than 5 years 9. Drinking alcohol more than 2 glasses or approximately 400 ml per month 10. Hearing threshold more than 25 dB at any frequency (250-8000 Hz) and ear in age 18-60 years 11. Hearing threshold more than 25 dB at any frequency (250-4000 Hz) and ear in age 61-70 years 12. Type As, Ad, B and C tympanogram or Type A tympanogram with absent ipsilateral acoustic reflex at frequency 1000 Hz in any ear. 13. Ear diseases that obstacle to hearing test and interpreting test results

Design outcomes

Primary

Measure	Time frame
Normative data of extended high frequency audiometry in different aged groups At the beginning of study Hearing threshold at frequency 9,000-16,000 Hz	—

Secondary

Measure	Time frame
Relationship between extended high frequency audiometry and high frequency distortion product otoacoustic emissions At the beginning of study DPOAEs amplitude (dB SPL), Hearing threshold at 9,000-16,000 Hz (dB HL)	—

Countries

Thailand

Contacts

Public ContactKittiphorn Luengrungrus

Faculty of Medicine, Khon Kaen University

Kittiphorn.l@kkumail.com0876008105

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026