Related Experiment Video
Updated: Feb 15, 2026

03:49
Author Spotlight: Optimizing EAS with Long Electrodes for Enhanced Cochlear Coverage and Hearing Preservation
Published on: October 11, 2024
1.2K
Evaluation of Hearing Loss in Pilots
Hayriye Atalay1, Seda Türkoğlu Babakurban1, Erdinç Aydın1
1Department of Otorhinolaryngology, Başkent University School of Medicine, Ankara, Turkey.
Turkish Archives of Otorhinolaryngology
|February 3, 2018
Summary
Pilot age, total flight hours, and aircraft type significantly correlate with high-frequency hearing loss. Helicopter pilots experienced greater hearing loss, particularly in the left ear, compared to other aircraft operators.
Area of Science:
- Aviation Medicine
- Audiology
- Occupational Health
Background:
- Pilot hearing health is crucial for aviation safety.
- High-intensity noise and atmospheric pressure changes pose risks to pilots' hearing.
- Factors like age, flight hours, and aircraft type may influence hearing loss.
Purpose of the Study:
- To investigate the relationship between hearing loss and pilot age, total flight hours, and aircraft types.
- To evaluate the impact of personal health conditions on pilot hearing levels.
Main Methods:
- Audiometric data from 234 Turkish pilots (ages 25-54) were analyzed.
- Data collected between January 2005 and January 2014 during annual aviation medical examinations.
- Airway and bone conduction thresholds were measured at specific frequencies (1-8 KHz).
Main Results:
- Significant correlation found between high-frequency hearing loss and pilot age and total flight hours.
- Helicopter pilots showed higher average hearing loss, especially in the left ear.
- No significant correlation between hearing loss and conditions like diabetes, hypertension, or smoking.
Conclusions:
- High-frequency hearing loss in pilots is significantly associated with age, flight hours, and aircraft type.
- These findings highlight the occupational risks of hearing damage in aviation personnel.
- Further research may inform preventative strategies for hearing loss in pilots.
Related Concept Videos
Hearing
57.6K
When we hear a sound, our nervous system is detecting sound waves—pressure waves of mechanical energy traveling through a medium. The frequency of the wave is perceived as pitch, while the amplitude is perceived as loudness.
57.6K
Pilot and Numeric Relaying
496
Pilot relaying is a type of differential protection used in power systems. It compares electrical quantities at the terminals of equipment via a communication channel instead of direct relay interconnection. This method is essential for transmission lines where the terminals are far apart, typically up to 80 km for lines with 69 to 115 kV ratings. Four types of communication channels are used for pilot relaying:
496
Line Loss
550
The different configurations of source-load connections include wye (star) and delta connections. The relationship between line and phase voltages and currents varies depending on the configuration. When the source is supplying power, it is transmitted through the wires to the load, and during this transmission, some power is absorbed by the wires, leading to line loss.
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
Line loss impacts power delivery efficiency in a balanced three-phase circuit. The symmetry in such a circuit simplifies the...
550
Reducing Line Loss
396
In a three-phase circuit, line loss is an indicator of energy dissipated as heat due to the resistance of transmission lines. To address this, incorporating transformers into the system—a step-up transformer at the source and a step-down transformer at the load—is a strategic solution. Two three-phase transformers are introduced to improve this.
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
With a step-up transformer at the source, the voltage is increased, thereby reducing the current in the transmission lines since power loss in...
396
Major Losses in Pipes
2.0K
When a fluid flows through a pipe, it experiences energy losses due to frictional resistance along the pipe walls, known as major losses. These energy losses result in a pressure drop, which varies based on the flow conditions — whether laminar or turbulent — and the specific physical properties of the fluid and pipe.
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
Fluid flow can be classified as laminar or turbulent, primarily based on the Reynolds number. This dimensionless number reflects the relative influence of inertial to viscous...
2.0K
Minor Losses in Pipes
2.0K
In pipe systems, minor losses refer to energy losses arising from components such as valves, bends, fittings, expansions, and other features that disrupt the steady flow of fluid. These disturbances cause energy dissipation through turbulence and resistance, which engineers quantify to manage system efficiency effectively.
Valves play a significant role in generating minor losses by obstructing or redirecting the fluid flow. When a valve is closed or partially closed, it restricts the flow...
Valves play a significant role in generating minor losses by obstructing or redirecting the fluid flow. When a valve is closed or partially closed, it restricts the flow...
2.0K

