Associate Safety Professional Practice Exam

What sound frequency range is considered to be the most harmful to hearing, especially in the speech range?

1. 100-500 Hz

2. 500-1000 Hz

3. 1000-4000 Hz

4. 4000-8000 Hz

The correct answer is: 1000-4000 Hz

The frequency range of 1000 to 4000 Hz is particularly critical when discussing hearing damage, as it encompasses the frequencies most associated with human speech. This range is essential for understanding and processing verbal communication, making it a focal point for audiological health. Sounds in this range are not only prominent in everyday conversation but are also the frequencies where the human ear is most sensitive. Prolonged exposure to loud noises within this frequency spectrum can lead to noise-induced hearing loss. The risk is heightened due to the ear's anatomical structure and how it resonates with these frequencies, leading to potential auditory damage. Additionally, sounds above this frequency range, while still capable of causing hearing damage, tend to be less critical for communication and understanding speech. Conversely, lower frequencies are generally less damaging to hearing unless at very high volumes. This makes the frequency range of 1000 to 4000 Hz especially significant in occupational safety concerning hearing conservation programs and preventive measures.