![]() ![]() Ambient sounds: a purring cat or a crackling fireplace.Nature sounds: crickets, ocean waves, winter wind, rainfall, waterfall, or birds chirping.Generally, this type of noise falls into three categories: The reason why many people find white noise soothing is that it has the same amplitude across all frequencies, producing a “shh” sound. Meanwhile, you’re less likely to be disturbed by the people passing by and talking loudly. For example, it’s not uncommon to fall asleep on the beach while enjoying the sound of the ocean. These noises are described as soothing and relaxing. Pink noise is said to have a similar effect. ![]() White noise machines replicate these sounds, masking other noises in the environment. Waterfalls are a white noise created by nature The sound of rustling leaves, ocean waves, moderate rainfall, and home appliances, such as refrigerators, is typically below 50 decibels and has a low frequency. Over time, exposure to noises above 70 decibels may affect hearing, warns the Centers for Disease Control and Prevention. Types of White Noiseīackground noise can be good or harmful, depending on its frequency and loudness. We’re going to discuss these aspects later, so read on. Some studies suggest that it might be doing more harm than good. White noise is also said to help with ADHD, tinnitus, and other medical conditions. They recommend using white noise machines to block external sounds that keep you from getting proper rest. The experts at Texas A&M Health point out that environmental noise can affect sleep. The normal hearing frequency is 20 to 20,000 hertz. One hertz is equal to one cycle per second. “Frequency” describes the number of times (cycles) that a wave repeats in one second, and it’s measured in hertz (Hz). Its intensity is constant throughout the audible frequency range and covers all frequencies. Live Science defines white noise as random noise that can mask other sounds in the environment.
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