For many people — particularly those living with tinnitus — silence is the enemy of sleep. The quieter the room, the louder the ringing seems. Sound masking is one of the most widely recommended and well-supported strategies for managing this, and for improving sleep quality more generally.
What is sound masking?
Sound masking is the use of background audio to reduce the contrast between silence and unwanted sounds. Rather than trying to create complete silence — which is rarely achievable and often counterproductive — the goal is to raise the ambient sound level just enough to make intrusive sounds, like tinnitus or external noise, less noticeable.
It's not the same as drowning out sounds with loud music or TV. Effective masking sounds are steady, non-intrusive, and spectrally matched to the sounds they're covering. White noise, pink noise, brown noise, and natural soundscapes like rain or ocean waves are all commonly used and all work somewhat differently.
Why background sound helps you sleep
The brain doesn't fully switch off during sleep — it continues monitoring the environment for threats. Sudden changes in sound level, rather than sound itself, are what typically cause arousal and waking. A consistent background sound reduces these sudden contrasts, meaning the brain's alerting system is less likely to be triggered by small environmental sounds like a car outside or a door closing.
For tinnitus sufferers specifically, the mechanism is slightly different. When background sound is present, the brain has more input to process and the tinnitus signal becomes a smaller proportion of the total auditory scene. The ringing doesn't disappear, but it becomes easier to ignore — and over time, the brain can learn to deprioritise it more effectively.
Choosing the right sound
Different sounds suit different people, and it's worth experimenting. The general categories are:
- White noise — equal energy across all frequencies. Effective at masking, but some find it harsh or clinical over long periods.
- Pink noise — more energy in lower frequencies, giving a warmer, more natural quality. Often reported as easier to sleep to than white noise.
- Brown noise — even more bass-heavy. Resembles a low rumble or distant waterfall. Popular among people who find white and pink noise too bright.
- Nature sounds — rain, ocean waves, rivers, forests. The irregular but patterned nature of these sounds is particularly effective at engaging and then releasing the brain's attention.
Getting the volume right
Volume is critical. The masking sound should be audible but not prominent — audible enough to be present, but not so loud it becomes intrusive itself. A common benchmark is around 50–60 decibels for sleep applications, roughly equivalent to a quiet conversation or a gentle fan. If you find yourself straining to hear the sound or if it's disrupting your thoughts rather than settling them, it's too loud.
It's also worth avoiding headphones or earbuds for overnight use unless they're specifically designed for sleep — extended pressure on the ear canal can cause discomfort and, in some cases, problems. A bedside speaker, a small white noise machine, or a pillow speaker are all better options for sustained overnight use.
Building a sleep routine around sound
Sound masking works best as part of a consistent sleep routine rather than as an emergency measure on bad nights. Using the same sound every night creates a conditioned association — over time, hearing that sound becomes a cue for the brain to begin settling. This is the same principle behind why many people find they sleep worse in hotels: the absence of familiar environmental cues disrupts the routine.
Starting masking sounds 20–30 minutes before you intend to sleep, rather than the moment you get into bed, gives your nervous system time to settle in response to the auditory environment. Combined with reduced screen time and dim lighting, sound masking can form a powerful component of a broader wind-down routine.