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Perceived Effects of High Frequency Hearing Loss in a Farming Population

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Previous research has suggested that farmers are at increased risk for noise-induced hearing loss (NIHL) due to excessive amounts of loud noise exposure from farming equipment. This study was conducted to determine the perceived effects of hearing loss in a small farming population. Ninety-three subjects, ranging in age from 18 to 75 years and actively engaged in the farming industry, were asked to complete a case history form regarding noise exposure and demographic information. Hearing sensitivity was assessed by obtaining air conduction thresholds at audiometric test frequencies 500-8000 Hz bilaterally. Subjects completed the Self Assessment of Communication (SAC) hearing handicap scale if any threshold in either ear was poorer than 25 dB HL. Study results revealed that the presence of high-frequency hearing loss and perceived hearing handicap increased with age, with the largest effects seen in those over 50 years of age. The relationship between SAC scores and four hearing handicap formulae utilizing different pure-tone averages was also investigated. The highest correlation coefficients occurred for formulae employing higher frequencies and excluding 500 Hz in the calculation. Implications of this study are that audiologists should be aware of the potential hearing handicap associated with high-frequency hearing loss in the farming population and educational programs concerning the dangers of noise and ways to prevent NIHL should be developed for those in farming occupations. Investigaciones previas han sugerido que los agricultores tienen un mayor riesgo para desarrollar una hipoacusia inducida por ruido (NIHL), debido a la exposición a cantidades excesivas de ruido intenso generado por el equipo agrícola. Este estudio se condujo para determinar la percepción de los efectos de tal pérdida auditiva en una pequeña población de agricultores. Se le pidió a noventa y tres sujetos, con edades entre los 18 y los 75 años y activamente involucrados en la industria agrícola, que completaran una fórmula de historia de caso, con datos de exposición a ruido e información demográfica. Se evaluó la sensibilidad auditiva obteniendo umbrales bilaterales de conducción aérea en las frecuencias de 5000 a 8000 Hz. Los sujetos completaron la escala de impedimento auditivo conocida como Auto Evaluación de la Comunicación (SAC), si cualquier de los umbrales en cualquier oído era menor de 25 dB HL. Los resultados de estudio mostraron que la presencia de una pérdida auditiva en altas frecuencias y la percepción de un impedimento auditivo se incrementaron con la edad, con los mayores efectos en aquellos mayores de 50 años. Se investigó también la relación entre los puntajes en el SAC y cuatro fórmulas de impedimento auditivo que utilizaban diferentes promedios tonales. Los coeficientes de correlación más altos se dieron con las fórmulas que usaban las frecuencias más altas y que excluían 500 Hz en el cálculo. Entre las implicaciones de este estudio destaca el que los audiólogos deben tener conciencia del impedimento auditivo potencial asociado con la hipoacusia de predominio en altas frecuencias en la población agrícola, y que deben desarrollarse, para esas poblaciones agrícolas, programas educacionales relacionados con los peligros del ruido y las formas de prevenir la NIHL.
Title: Perceived Effects of High Frequency Hearing Loss in a Farming Population
Description:
Previous research has suggested that farmers are at increased risk for noise-induced hearing loss (NIHL) due to excessive amounts of loud noise exposure from farming equipment.
This study was conducted to determine the perceived effects of hearing loss in a small farming population.
Ninety-three subjects, ranging in age from 18 to 75 years and actively engaged in the farming industry, were asked to complete a case history form regarding noise exposure and demographic information.
Hearing sensitivity was assessed by obtaining air conduction thresholds at audiometric test frequencies 500-8000 Hz bilaterally.
Subjects completed the Self Assessment of Communication (SAC) hearing handicap scale if any threshold in either ear was poorer than 25 dB HL.
Study results revealed that the presence of high-frequency hearing loss and perceived hearing handicap increased with age, with the largest effects seen in those over 50 years of age.
The relationship between SAC scores and four hearing handicap formulae utilizing different pure-tone averages was also investigated.
The highest correlation coefficients occurred for formulae employing higher frequencies and excluding 500 Hz in the calculation.
Implications of this study are that audiologists should be aware of the potential hearing handicap associated with high-frequency hearing loss in the farming population and educational programs concerning the dangers of noise and ways to prevent NIHL should be developed for those in farming occupations.
Investigaciones previas han sugerido que los agricultores tienen un mayor riesgo para desarrollar una hipoacusia inducida por ruido (NIHL), debido a la exposición a cantidades excesivas de ruido intenso generado por el equipo agrícola.
Este estudio se condujo para determinar la percepción de los efectos de tal pérdida auditiva en una pequeña población de agricultores.
Se le pidió a noventa y tres sujetos, con edades entre los 18 y los 75 años y activamente involucrados en la industria agrícola, que completaran una fórmula de historia de caso, con datos de exposición a ruido e información demográfica.
Se evaluó la sensibilidad auditiva obteniendo umbrales bilaterales de conducción aérea en las frecuencias de 5000 a 8000 Hz.
Los sujetos completaron la escala de impedimento auditivo conocida como Auto Evaluación de la Comunicación (SAC), si cualquier de los umbrales en cualquier oído era menor de 25 dB HL.
Los resultados de estudio mostraron que la presencia de una pérdida auditiva en altas frecuencias y la percepción de un impedimento auditivo se incrementaron con la edad, con los mayores efectos en aquellos mayores de 50 años.
Se investigó también la relación entre los puntajes en el SAC y cuatro fórmulas de impedimento auditivo que utilizaban diferentes promedios tonales.
Los coeficientes de correlación más altos se dieron con las fórmulas que usaban las frecuencias más altas y que excluían 500 Hz en el cálculo.
Entre las implicaciones de este estudio destaca el que los audiólogos deben tener conciencia del impedimento auditivo potencial asociado con la hipoacusia de predominio en altas frecuencias en la población agrícola, y que deben desarrollarse, para esas poblaciones agrícolas, programas educacionales relacionados con los peligros del ruido y las formas de prevenir la NIHL.

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