Noise Exposure Questionnaire: A Tool for Quantifying Annual Noise Exposure

Abstract

Background: Exposure to both occupational and nonoccupational noise is recognized as a risk factor for noise-induced hearing loss (NIHL). Although audiologists routinely inquire regarding history of noise exposure, there are limited tools available for quantifying this history or for identifying those individuals who are at highest risk for NIHL. Identifying those at highest risk would allow hearing conservation activities to be focused on those individuals.

Purpose: To develop a detailed, task-based questionnaire for quantifying an individual's annual noise exposure (ANE) arising from both occupational and nonoccupational sources (aim 1) and to develop a short screening tool that could be used to identify individuals at high risk of NIHL (aim 2).

Research design: Review of relevant literature for questionnaire development followed by a cross-sectional descriptive and correlational investigation of the newly developed questionnaire and screening tool.

Study sample: One hundred fourteen college freshmen completed the detailed questionnaire for estimating ANE (aim 1) and answered the potential screening questions (aim 2). An additional 59 adults participated in data collection where the accuracy of the screening tool was evaluated (aim 2).

Data collection and analysis: In study aim 1, all participants completed the detailed questionnaire and the potential screening questions. Descriptive statistics were used to quantify participant participation in various noisy activities and their associated ANE estimates. In study aim 2, linear regression techniques were used to identify screening questions that could be used to predict a participant's estimated ANE. Clinical decision theory was then used to assess the accuracy with which the screening tool predicted high and low risk of NIHL in a new group of participants.

Results: Responses on the detailed questionnaire indicated that our sample of college freshmen reported high rates of participation in a variety of occupational and nonoccupational activities associated with high sound levels. Although participation rates were high, ANE estimates were below highest-risk levels for many participants because the frequency of participation in these activities was low in many cases. These data illustrate how the Noise Exposure Questionnaire (NEQ) could be used to provide detailed and specific information regarding an individual's exposure to noise. The results of aim 2 suggest that the screening tool, the 1-Minute Noise Screen, can be used to identify those participants with high- and low-risk noise exposure, allowing more in-depth assessment of noise exposure history to be targeted at those most at risk.

Conclusions: The NEQ can be used to estimate an individual's ANE and the 1-Minute Noise Screen can be used to identify those participants at highest risk of NIHL. These tools allow audiologists to focus hearing conservation efforts on those individuals who are most in need of those services.

Figure 1

Overview of the computation of annual noise exposure (ANE) in L_Aeq8760h from responses to the Noise Exposure Questionnaire (NEQ). These procedures follow protocols described by Neitzel et al.(2004a) and noise exposure calculations extrapolated from those recommended by the National Institute for Occupational Safety and Health (NIOSH, 1998) for computing occupational exposures for a 40-hour work week.

Figure 2

Percentage of subjects reporting participation in each of the 10 continuous-noise activities and 1 impulse-noise activity queried on the Noise Exposure Questionnaire (NEQ) in aim 1. Results for men and women are displayed separately, as indicated in the legend.

Figure 3

Distribution of Annual Noise Exposure (ANE) values in L_Aeq8760h for the subjects participating in aim 1. Results for men and women are displayed separately, as indicated in the legend.