Rather than setting a subjective standard (how loud a sound is to the subject), the objective nature of a decibel measurement, which measures how intense the sound energy is in a confined space, makes regulation significantly easier. Decibels are essential for setting guidelines and safety standards for sound exposure limitations. This is calculated relative to the threshold of human hearing, which is 0 decibels. dB: What is a decibel? UNSW School of Physics. What are decibels and why do they matter?Ī decibel is a measurement that expresses the relative intensity of a sound pressure level (SPL). Our Reviews Team assembled this guide to help you better understand decibels, the measurement of sound, and how sound impacts your hearing health. Regardless of your age or your degree of hearing loss, it’s important to limit excessive noise exposure and use protective equipment when you’re around loud sounds for extended periods of time. A Life Course Approach to Hearing Health. Preserving your hearing health is important for basic communication, balance, health, and even brain acuity. Whether the cause is genetic, age-related, or environmental, approximately 48 million Americans have some degree of hearing loss.
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