Fundamentals: Science, Sound Types & Safety

Learn how looped sound machines trigger infant micro-arousals and use crib-distance tests, dBA targets, and continuous playback to protect deeper sleep.

Learn how looping sound triggers infant arousals and disrupts sleep, then switch to continuous 40–45 dBA audio and simple checks for calmer nights.

Use sound machines strategically while baby is awake: brief nature sounds at 40-45 dBA, measured at ear level, with quiet intervals to encourage babbling.

Learn how white noise affects infant language processing and sleep, with practical advice on safe volume, timing, placement, and healthier sound options.

Focus on crib-distance measurements, not box specs: place the machine 7–8 feet from the crib and target 45–50 dBA with dBC no more than 5 dB higher while avoiding spectral peaks. Get clear steps for accurate phone-based testing and room-specific placement so masking works without overstimulating infants.