Morphological Variations and Biometrics of Ear: An Aid to Personal Identification

Area of Science:

• Anthropology
• Forensic Science
• Biometrics

Background:

• External ear morphology and dimensions exhibit ethnic variations, crucial for forensic personal identification.
• Ear characteristics can be utilized for identifying living or deceased individuals.

Purpose of the Study:

• To ascertain the uniqueness of morphological and biometric ear variations for individualization.
• To compare ear characteristics between North East (NE) and North West (NW) Indian subpopulations.

Main Methods:

• Study involved 80 students (40 from NE, 40 from NW India).
• Nine ear parameters and two indices (Ear Index, Lobule Index) were measured twice using digital Vernier calipers.
• Morphological ear shapes, lobule attachment, and correlations between variables were analyzed.

Main Results:

• Attached ear lobes (65%) were more common than free ear lobes (35%).
• Oval ear shape was most prevalent, followed by triangular, rectangular, and round shapes.
• North West Indian population generally exhibited larger ear measurements, with exceptions in tragus length and lobule index. No significant sex-based differences in ear indices were found, though left ear indices were generally higher than right.

Conclusions:

• Observed ear variations provide valuable data for anthropological and forensic applications.
• These biometric and morphological differences can aid in the inclusion or exclusion of individuals during identification processes.