Prevalence of high frequency hearing loss consistent with noise exposure among people working with sound systems and general population in Brazil: a cross-sectional study

Music as a unique source of noise-induced hearing loss

Music is among the most important artistic, cultural, and entertainment modalities in any society. With the proliferation of music genres and the technological advances that allow people to consume music in any location and at any time, music over-exposure has become a significant public health issue. Music-induced hearing loss has a great deal in common with noise-induced hearing loss. However, there are important differences that make music a unique insult to the auditory system and a unique threat to public health. Its unique properties also make it a potentially valuable asset in sound conditioning paradigms. This review discusses hearing loss from noise and music, comparing and contrasting the two. Recent research on music-induced hearing loss is reviewed, followed by discussion of the differences in music-induced hearing loss between performers and consumers. The review concludes with a discussion of the potential of music as a sound conditioning stimulus to protect against acquired hearing loss.

Hearing protection behavior of farmers in Iran: Application of the protection motivation theory

BACKGROUND: Noise in work environments is regarded as a serious issue. Hearing loss leads to socio-economic problems and huge costs to families and communities. Agriculture is one of the professions in which individuals face occupational noise. Farmers are the second leading group in suffering from hearing loss in the world. OBJECTIVE: This study aims to predict the hearing protection behavior of farmers by using the Protection Motivation Theory (PMT). METHOD: This descriptive study was conducted through a survey. The questionnaire was the main tool for data collection. The population of the study consisted of wheat farmers in Kermanshah province (N = 126,900). By using Krejcie and Morgan’s table and stratified random sampling method, 382 farmers were taken as the research sample. The validity of the questionnaire was confirmed by the experts of this field, and the reliability was proved through a pilot study to calculate Cronbach’s alpha. RESULTS: The findings showed that perceived self-efficacy, perceived response efficacy, perceived vulnerability, and perceived response costs had the strongest effects on farmers’ motivation to protect their hearing, respectively. Furthermore, protection motivation had a significant effect on farmers’ protection behavior. CONCLUSION: Threat and coping appraisals as cognitive mediating processes determined farmers’ behavior for hearing protection. The results illustrated that the components of PMT were appropriate predictors of farmers’ hearing protection behavior.

Promotion of osteoporosis-preventive behaviors in adolescents: Application of protection motivation theory

BACKGROUND

Osteoporosis is considered a health problem that can be simply prevented by lifestyle modifications in adolescence. Therefore, this study was conducted to investigate the effects of protection motivation theory (PMT)-based training on osteoporosis-preventive behaviors in female high school students in Zahedan, Iran.

MATERIALS AND METHODS

The present quasi-experimental study was performed on 240 female high school students who were selected by a multistage sampling technique in Zahedan in 2019-2020. To collect the data, a multipart questionnaire was distributed among the participants in three stages, namely at the baseline, immediately, and 2 months after the intervention. This instrument consisted of demographic information, socioeconomic status, knowledge, PMT constructs, and preventive behaviors. The intervention group was subjected to educational content. The collected data were analyzed in SPSS software (version 22) by descriptive and analytical tests (i.e., Chi-square, independent t-test, and ANOVA).

RESULTS

Based on the results, the intervention and control groups showed no significant difference in terms of the mean score of knowledge, theoretical constructs, and preventive behaviors at the baseline (P > 0.05). However, the two groups were significantly different in terms of the mentioned variables immediately and 2 months after the intervention (P = 0.001). Mean score of preventive behaviors, the two groups also demonstrated a significant difference (i.e., calcium intake, physical activity, and sunlight exposure) 2 months after the intervention, compared to before the intervention. (P = 0.001).

CONCLUSION

The findings of the present study were indicative of the PMT effectiveness, which can, therefore, be used as a framework for designing educational programs regarding osteoporosis prevention.

Sexual and reproductive health self-care: a theory-based intervention

Purpose

This study, a theory-based interventional study, aims to promote self-care behaviors regarding sexual and reproductive health in adolescents (female) in Karaj, Iran.

Design/methodology/approach

This study was conducted on 90 female students of the Alborz University of Medical Sciences in Iran. For selecting subjects, the researchers went to two girls' dormitories on working days and tried to observe the proportion of students with different fields. Initially, 200 eligible female students were identified in the dormitories of Alborz University of Medical Sciences. Based on the sample size estimation, 100 research units were divided into two groups of receiving counseling (intervention group) and not receiving counseling (control group) by four-digit block randomization. Sexual and reproductive health self-care questionnaire was used as a tool for data collection before, after and one month after intervention. Data were analyzed by using X2 and ANOVA tests using SPSS (16).

Findings

Both groups were homogeneous in terms of demographic characteristics before the intervention. The results of the study indicated that after education, sexual and reproductive knowledge (p < 0.001), self-care of sexual health (p < 0.001), self-care of menstrual and genital health (p < 0.001) increased significantly. But, regarding parents' communications (p = 0.11), conversation barriers with parents (p = 0.83), interaction with (p = 0.79) and the perceptions of sexual risk behaviors relationships (p = 0.61) differences are not significant.

Research limitations/implications

Failure of parents to participate in this study and the implementation of this study only on the female sex were main limitations of the present study.

Practical implications

Theory-based education can improve sexual and reproductive health in adolescents' girls.

Originality/value

All Authors declare the manuscript entitled “Sexual and reproductive health self-care: a theory-based intervention” is original work of the author. All data, tables, figures, etc. used in the manuscript are prepared originally by authors; otherwise, the sources are cited and reprint permission is attached.

The hearing health of live-music sound engineers

Most studies of hearing loss prevention in the music industry focus on the risk of hearing injury to musicians. However, live-music sound engineers (LMSE) may also be at risk of hearing injury due to their work-related sound exposure. We studied 27 LMSE, all of whom underwent otologic examination, including audiometry, distortion product otoacoustic emissions, speech discrimination and uncomfortable loudness levels, and completed a questionnaire investigating their history of sound exposure and use of hearing protectors. Hearing thresholds were significantly poorer than normative data across several frequencies, and a substantial proportion reported constant tinnitus (30%) and reduced sound tolerance (41%). Use of hearing protection was relatively low, with many reporting interference with their job when using it. Our results suggest that LMSE are at risk of hearing injury due to their work-related sound exposure.

The hearing function of sound engineers: A hearing conservation perspective

Background

Occupational activities performed by sound engineers are associated with hearing loss. However, there is a dearth of research on the hearing functions and the related hearing loss for sound engineers.

Objectives

To determine the hearing function and early effects of noise on the hearing ability of sound engineers, and to establish whether there are hearing conservation programmes (HCPs) available for sound engineer participants in Johannesburg.

Methods

A quantitative cross-sectional design was used. Eight sound engineers from the Academy of Sound Engineering (ASE) participated in the study. The following data were collected from the participants: case history data, ear-related symptoms and hearing conservation data. Hearing screening followed by full diagnostic audiological assessments was conducted for each participant. Descriptive statistics and one-sample t-test were used to analyse the data (confidence interval [CI] = 95%).

Results

Participants reported tinnitus and aural fullness as common complaints. Only one participant had a unilateral impacted cerumen. All the participants presented with hearing within normal limits bilaterally, with a percentage loss of hearing (PLH) of 1.1% for all the participants. However, five participants presented with a notched configuration that was ≥ 10 decibel (dB), in the high frequency region at 3000 Hz and 6000 Hz bilaterally. One-sample t-test (p = 0.001) inferred that at a mean age of 27.6 years (standard deviation [SD] = 3.85), a notch at 3000 Hz and 6000 Hz was associated with an early sign of a hearing loss for the study participants. An HCP was not in place at the study site.

Conclusion

The study indicated a younger age as an associated early sign of noise-induced hearing loss (NIHL) for the study participants, and that audiologists’ clinical practice needs to explore HCP strategies specific for the sound engineers in order to prevent hearing loss.

Noise-induced hearing loss and its prevention: Integration of data from animal models and human clinical trials

Animal models have been used to gain insight into the risk of noise-induced hearing loss (NIHL) and its potential prevention using investigational new drug agents. A number of compounds have yielded benefit in pre-clinical (animal) models. However, the acute traumatic injury models commonly used in pre-clinical testing are fundamentally different from the chronic and repeated exposures experienced by many human populations. Diverse populations that are potentially at risk and could be considered for enrollment in clinical studies include service members, workers exposed to occupational noise, musicians and other performing artists, and children and young adults exposed to non-occupational (including recreational) noise. Both animal models and clinical populations were discussed in this special issue, followed by discussion of individual variation in vulnerability to NIHL. In this final contribution, study design considerations for NIHL otoprotection in pre-clinical and clinical testing are integrated and broadly discussed with evidence-based guidance offered where possible, drawing on the contributions to this special issue as well as other existing literature. The overarching goals of this final paper are to (1) review and summarize key information across contributions and (2) synthesize information to facilitate successful translation of otoprotective drugs from animal models into human application.

Disorders induced by direct occupational exposure to noise: Systematic review

Background:

To review the available scientific literature about the effects on health by occupational exposure to noise.

Materials and Methods:

A systematic review of the retrieved scientific literature from the databases MEDLINE (via PubMed), ISI-Web of Knowledge (Institute for Scientific Information), Cochrane Library Plus, SCOPUS, and SciELO (collection of scientific journals) was conducted. The following terms were used as descriptors and were searched in free text: “Noise, Occupational,” “Occupational Exposure,” and “Occupational Disease.” The following limits were considered: “Humans,” “Adult (more than 18 years),” and “Comparative Studies.”

Results:

A total of 281 references were retrieved, and after applying inclusion/exclusion criteria, 25 articles were selected. Of these selected articles, 19 studies provided information about hearing disturbance, four on cardiovascular disorders, one regarding respiratory alteration, and one on other disorders.

Conclusions:

It can be interpreted that the exposure to noise causes alterations in humans with different relevant outcomes, and therefore appropriate security measures in the work environment must be employed to minimize such an exposure and thereby to reduce the number of associated disorders.

Declining Prevalence of Hearing Loss in US Adults Aged 20 to 69 Years

Importance

As the US population ages, effective health care planning requires understanding the changes in prevalence of hearing loss.

Objective

To determine if age- and sex-specific prevalence of adult hearing loss has changed during the past decade.

Design, Setting, and Participants

We analyzed audiometric data from adults aged 20 to 69 years from the 2011-2012 cycle of the US National Health and Nutrition Examination Survey, a cross-sectional, nationally representative interview and examination survey of the civilian, noninstitutionalized population, and compared them with data from the 1999-2004 cycles. Logistic regression was used to examine unadjusted, age- and sex-adjusted, and multivariable-adjusted associations with demographic, noise exposure, and cardiovascular risk factors. Data analysis was performed from April 28 to June 3, 2016.

Interventions

Audiometry and questionnaires.

Main Outcomes and Measures

Speech-frequency hearing impairment (HI) defined by pure-tone average of thresholds at 4 frequencies (0.5, 1, 2, and 4 kHz) greater than 25 decibels hearing level (HL), and high-frequency HI defined by pure-tone average of thresholds at 3 frequencies (3, 4, and 6 kHz) greater than 25 decibels HL.

Results

Based on 3831 participants with complete threshold measurements (1953 men and 1878 women; mean [SD] age, 43.6 [14.4] years), the 2011-2012 nationally weighted adult prevalence of unilateral and bilateral speech-frequency HI was 14.1% (27.7 million) compared with 15.9% (28.0 million) for the 1999-2004 cycles; after adjustment for age and sex, the difference was significant (odds ratio [OR], 0.70; 95% CI, 0.56-0.86). Men had nearly twice the prevalence of speech-frequency HI (18.6% [17.8 million]) as women (9.6% [9.7 million]). For individuals aged 60 to 69 years, speech-frequency HI prevalence was 39.3% (95% CI, 30.7%-48.7%). In adjusted multivariable analyses for bilateral speech-frequency HI, age was the major risk factor (60-69 years: OR, 39.5; 95% CI, 10.5-149.4); however, male sex (OR, 1.8; 95% CI, 1.1-3.0), non-Hispanic white (OR, 2.3; 95% CI, 1.3-3.9) and non-Hispanic Asian race/ethnicity (OR, 2.1; 95% CI, 1.1-4.2), lower educational level (less than high school: OR, 4.2; 95% CI, 2.1-8.5), and heavy use of firearms (≥1000 rounds fired: OR, 1.8; 95% CI, 1.1-3.0) were also significant risk factors. Additional associations for high-frequency HI were Mexican-American (OR, 2.0; 95% CI, 1.3-3.1) and other Hispanic race/ethnicity (OR, 2.4; 95% CI, 1.4-4.0) and the combination of loud and very loud noise exposure occupationally and outside of work (OR, 2.4; 95% CI, 1.4-4.2).

Conclusions and Relevance

Adult hearing loss is common and associated with age, other demographic factors (sex, race/ethnicity, and educational level), and noise exposure. Age- and sex-specific prevalence of HI continues to decline. Despite the benefit of delayed onset of HI, hearing health care needs will increase as the US population grows and ages.

Association between metabolic syndrome and sensorineural hearing loss: a cross-sectional study of 11,114 participants

BACKGROUND/OBJECTIVES

Hearing loss (HL) is associated with certain diseases and affects health, resulting in a low quality of life. Some components of the metabolic syndrome (MetS) coincide with the risk factors for sensorineural hearing loss (SNHL). To date, very few studies have examined the link between MetS and HL. The aim of the current study was to try to understand the potential association between MetS and HL.

METHODS

Using Iranian health surveys of professional drivers, we enrolled 11,114 individuals aged 20-60 years, whose main job is to operate a motor vehicle. We examined participants for the presence and absence of SNHL and the components of the MetS. Additionally, we investigated the relationship between MetS and the pure tone air conduction hearing thresholds of participants with SNHL, including low-frequency and high-frequency thresholds.

RESULTS

This cross-sectional study consisted of 11,114 participants: 3202 (28.81%) diagnosed with MetS and 7911 (71.18%) without and 2772 (24.94%) with SNHL and 8432 (75.86%) without. Participants with SNHL had a higher number of components of MetS (P<0.001 for all components).

CONCLUSION

Our results demonstrated that an association possibly exists between different components of MetS (obesity, hypertension, hypertriglyceridemia, high fasting glucose levels, and waist circumference) and SNHL in a population of West Azerbaijan drivers. Therefore, it is important to schedule periodic checkups for drivers to detect and avoid the increase in MetS components at an early stage in this population.

CORRELATION OF HEARING IMPAIRMENT AND COMMUNICATION DISORDER AMONG GERIATRIC IN GERIATRIC CLINIC, DR. SOETOMO HOSPITAL SURABAYA

The objective of this study was to analyze correlation between hearing impairment and communication disorder among geriatrics in Geriatric Clinic, Dr. Soetomo Hospital. A randomized cross-sectional study design has been used in this study. Analysis was done by filling in some questionnaire and interview to some patients who were randomly selected according to predetermined condition. The data were collected and reviewed for the factors, which were assumed as risk factors of hearing disorder and life’s quality deterioration. Statistical analysis was performed using Fisher’s Exact Test using SPSS program version 17. Results showed correlation between hearing impairment and the quality of life and social communication (p=0.033, OR=6.11). However, there was no correlation between hearing impairment with diabetes mellitus (p=0.255), with hypertension (p=0.565), and noisy environment (p=0.689). In conclusion, the study showed that there is correlation between hearing impairment and communication disorder.

Hábitos e queixas auditivas de adolescentes usuários de estéreos pessoais

RESUMO Objetivo: caracterizar os hábitos e queixas auditivas de adolescentes normoouvintes, usuários de estéreos pessoais e relacioná-los com a atividade do sistema olivococlear medial. Métodos: foram avaliados 21 indivíduos, com idades entre 12 e 19 anos, com audição normal. Todos responderam a um questionário fechado referente ao comportamento auditivo e a queixa de zumbido e realizaram avaliação audiológica: Audiometria, Imitanciometria, Emissões Otoacústicas Evocadas Transientes e Efeito de Supressão. Resultados: todos os participantes do estudo ficam expostos à música, a maioria, menos de duas horas diárias. Observou-se a presença do efeito de supressão na orelha direita em 66,67% e na esquerda em 61,90% dos adolescentes. Não foi encontrada associação significante entre a presença do efeito de supressão entre as orelhas, os gêneros e entre tempos de exposição sonora diária e ausência do efeito de supressão. Parte da amostra dos adolescentes referiu ter zumbido, destes, a maioria referiu zumbido em ambas as orelhas. Houve associação significante entre a exposição sonora diária e a presença de zumbido e entre a ausência do efeito de supressão da orelha direita e a presença de zumbido. Conclusão: os adolescentes pesquisados referiram ouvir música diariamente, menos de duas horas diárias. A maioria apresentou efeito de supressão. Houve associação entre queixa de zumbido e ausência do efeito de supressão na orelha direita. Além disso, quanto maior o tempo de exposição sonora maior também a presença de queixa de zumbido nestes adolescentes.

Predictive factors of occupational noise-induced hearing loss in Spanish workers: A prospective study

The purpose of our study was to identify the main factors associated with objective noise-induced hearing loss (NIHL), as indicated by abnormal audiometric testing, in Spanish workers exposed to occupational noise in the construction industry. We carried out a prospective study in Tenerife, Spain, using 150 employees exposed to occupational noise and 150 age-matched controls who were not working in noisy environments. The variables analyzed included sociodemographic data, noise-related factors, types of hearing protection, self-report hearing loss, and auditory-related symptoms (e.g., tinnitus, vertigo). Workers with pathological audiograms had significantly longer noise-exposure duration (16.2 ± 11.4 years) relative to those with normal audiograms (10.2 ± 7.0 years; t = 3.99, P < 0.001). The vast majority of those who never used hearing protection measures had audiometric abnormalities (94.1%). Additionally, workers using at least one of the protection devices (earplugs or earmuffs) had significantly more audiometric abnormalities than those using both protection measures simultaneously (Chi square = 16.07; P < 0.001). The logistic regression analysis indicates that the use of hearing protection measures [odds ratio (OR) = 12.30, confidence interval (CI) = 4.36-13.81, P < 0.001], and noise-exposure duration (OR = 1.35, CI = 1.08-1.99, P = 0.040) are significant predictors of NIHL. This regression model correctly predicted 78.2% of individuals with pathological audiograms. The combined use of hearing protection measures, in particular earplugs and earmuffs, associates with a lower rate of audiometric abnormalities in subjects with high occupational noise exposure. The use of hearing protection measures at work and noise-exposure duration are best predictive factors of NIHL. Auditory-related symptoms and self-report hearing loss do not represent good indicators of objective NIHL. Routine monitoring of noise levels and hearing status are of great importance as part of effective hearing conservation programs.

Noise exposure and hearing impairment among Chinese restaurant workers and entertainment employees in Hong Kong

Background

Noise-induced hearing loss (NIHL) is a major concern in the non-manufacturing industries. This study aimed to investigate the occupational noise exposure and the NIHL among Chinese restaurant workers and entertainment employees working in the service industry in Hong Kong.

Methods

This cross-sectional survey involved a total of 1,670 participants. Among them, 937 were randomly selected from the workers of Chinese restaurants and 733 were selected from workers in three entertainment sectors: radio and television stations; cultural performance halls or auditoria of the Leisure and Cultural Services Department (LCSD); and karaoke bars. Noise exposure levels were measured in the sampled restaurants and entertainment sectors. Each participant received an audiometric screening test. Those who were found to have abnormalities were required to take another diagnostic test in the health center. The “Klockhoff digit” method was used to classify NIHL in the present study.

Results

The main source of noise inside restaurants was the stoves. The mean hearing thresholds showed a typical dip at 3 to 6 KHz and a substantial proportion (23.7%) of the workers fulfilled the criteria for presumptive NIHL. For entertainment sectors, employees in radio and television stations generally had higher exposure levels than those in the halls or auditoria of the LCSD and karaoke bars. The mean hearing thresholds showed a typical dip at 6 KHz and a substantial proportion of the employees fulfilled the criteria for presumptive NIHL (38.6%, 95%CI: 35.1–42.1%). Being male, older, and having longer service and daily alcohol consumption were associated with noise-induced hearing impairment both in restaurant workers and entertainment employees.

Conclusion

Excessive noise exposure is common in the Chinese restaurant and entertainment industries and a substantial proportion of restaurant workers and entertainment employees suffer from NIHL. Comprehensive hearing conservation programs should be introduced to the service industry in Hong Kong.

Análise de diferentes estudos epidemiológicos em Audiologia realizados no Brasil

TEMA: a audição, responsável pela aquisição e desenvolvimento da linguagem, é um dos sentidos que permitem a ocorrência das relações interpessoais e com o meio ambiente. Desta forma, o levantamento epidemiológico da prevalência de deficientes auditivos em uma comunidade é de extrema importância para a adequação das medidas de saúde pública nos vários níveis de prevenção. OBJETIVO: verificar na literatura científica, estudos que tiveram por interesse a busca de conhecimento no âmbito epidemiológico relacionados à perda auditiva no Brasil. Foram utilizados um total de 13 artigos sendo, 11 de estudos transversais, um estudo caso-controle, e outro estudo de coorte. CONCLUSÃO: Os trabalhadores expostos a ruído ocupacional têm recebido maior atenção por parte dos estudos epidemiológicos, diferentemente da população idosa e neonatal. Apenas um estudo com base populacional, seguindo o Protocolo sugerido pela OMS, foi realizado. É importante a realização de mais estudos relacionados à deficiência auditiva no país a fim de elaborar ações de saúde e assistência adequadas às necessidades locais.