It's usually colder at night - and especially often just before dawn. This means that air pressure is lower, which would affect sound velocity and hence amplitude. There is less ambient noise, hence a higher signal-to-noise (SNR) ratio.
Temperature inversion is the reason why sounds can be heard much more clearly over longer distances at night than during the day—an effect often incorrectly attributed to the psychological result of nighttime quiet.
Why does everything seem louder at night? There is less natural and human movement at night, so the level of background noise is lower, and sounds that do occur carry farther; In darkness there is less to see, so the human mind's focus subconsciously redirects to the sonic sense.
Racing Mind and Anxiety
Rapid thoughts are often a symptom associated with anxiety. They can make people feel out of control or as if they are going crazy. When it comes to sleep, this effect of anxiety is a cyclical problem. Because your brain struggles to focus when it is tired, it often leads to racing thoughts.
Many people can hear the air movement through their throats and lungs, especially if they have a wheeze. And let's not forget the multitude of natural sounds, from insects to rodents and birds and wind passing through the trees or tall grass, or distant thunderstorms, or a nearby beach with its endless flow of waves.
While it's true that during some sleep stages our brains pay very little attention to what's happening around us, during other stages we're able to hear and process sounds even in our sleep. Not only that, but we are listening for certain sounds while we sleep, even when we're in deep sleep.
For adults with ADHD, those distractions can make staying on task a greater challenge than usual. Often someone who has ADHD can think better and stay on task longer if there is some white noise in her surroundings—maybe softly playing music, a fan in the corner, or the hum from an overhead air vent.
People with ADHD have lower levels of dopamine, and the brown noise stimulates their brains to reach optimal cognition and the desired resting brain state. Why does background noise help teens with ADHD? People with ADHD need more noise in order to focus their attention and reach a state of relaxation.
Turn down your stress levels
An overactive mind at night and sleep do not go well together, and it's because of stress. Stress is also why you want to sleep but your brain won't stop talking to itself.
Tinnitus frequently seems louder at night because we are not as distracted and stimulated by things in our environment. At night when we try to fall asleep, it's dark and quiet, so our brain will often start seeking stimulation. Unfortunately, this search inadvertently turns to our tinnitus for that stimulation.
The condition can affect children and adults, but is considered rare, occurring in an estimated one in 50,000 people. It can be caused by a number of factors.
Hyperacusis is when everyday sounds seem much louder to you than they should. Treatment can help. See a GP if you think you have hyperacusis.
It's noisy. The brain creates noise to fill the silence, and we hear this as tinnitus. Perhaps only someone with profound deafness can achieve this level of silence, so paradoxically loud.
Brown noise is a low-frequency background sound that helps people with ADHD focus and feel calm.
However, anecdotal evidence suggests that brown noise can improve focus, productivity, and sleep in ADHD. That's because brown noise may be able to mimic the effects of dopamine on the ADHD brain as well as minimize internal and external distractions.
Music for ADHD brains: what to play and what to skip. Music can be helpful for people with ADHD, but that comes with stipulations. For example, listening to binaural audio, background music without vocals, or chill electronic music like lo-fi hip hop can help ADHDers with focus and concentration.
What Is Time Blindness? A good sense of time is one critical executive function. It involves knowing what time it is now, how much time is left, and how quickly time is passing. People with ADHD tend to be "time blind," meaning they aren't aware of the ticking of time.
Research has also shown that white and pink noise may help improve certain sleep problems. Brown noise may help with concentration and anxiety.
While not all people with ADHD have sound sensitivity and not all with sound sensitivity have ADHD, the sensory issue is often comorbid (ADHD doesn't cause sound sensitivity, but they are comorbid due to other conditions such as autism or misophonia).
(Inside Science) -- Even when sleeping deeply you are more aware of what is going on around you than you might realize. New research suggests that the human brain is constantly monitoring its surroundings, including processing sounds, to decide if you need to wake up -- it could even let you learn in your sleep.
When you yawn, both the tensor tympani muscle and the stapedius muscles are tightened. Both these muscles control the amount of sound entering your ear.
Echo the Lyrebird
Perhaps the most famous example of a Superb lyrebird crying like a baby is Echo, who lives at the Taronga Zoo in New South Wales, Australia.