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Influence of noise and sounds on a person.
For all living organisms, including humans, sounds and noises are one of the external phenomena of the environment. But in our technogenic era, the natural voices of Nature are becoming rarer, disappearing completely or drowned out by the impending urban and technological civilization.
Man has always lived in a world of different sounds and noises.Sound is generally referred to as mechanical vibrations of the external environment perceived by the human hearing apparatus (from 16 to 20,000 vibrations per second). Oscillations of a higher frequency are ultrasonic, lower - infrasonic. Noises are loud sounds that combine to create a jarring and unstable sound.
For all living organisms, including humans, sounds and noises are one of the external phenomena of the environment.
A light pleasant sound of rain, a quiet soothing rustle of leaves, a lulling light howl of a breeze, a murmur of a forest stream, a pleasant song of birds, a light splash of water, the sound of the surf are always pleasant to a person. They soothe, relieve stress, charge with positive energy. But in our technogenic age, the natural voices of Nature are becoming increasingly rare, disappearing altogether or being drowned out by the impending urban-technological civilization.
In nature, loud sounds are rare, the noise is relatively weak and short-lived. The combination and duration of sound stimuli gives animals and humans time necessary to assess their character and form a certain appropriate response to it. High and sustained power sounds and noises affect the hearing aid and nerve centers and can cause pain, shock and even death. This is how noise pollution works.Prolonged noise affects the hearing organ and reduces sensitivity to sound. It leads to a breakdown in the activity of the heart, liver and other organs, exhaustion and overload of the nerve cells of the human body. Weakened nerve cells cannot clearly and evenly coordinate the work of certain or even all body systems. And as a result, there are violations of their activities.
Noise level is measured in decibels, the unit of sound pressure level. The pressure is not unlimited. The noise level of 20-30 decibels is harmless to humans, it is the so-called natural background noise, which a person reacts to without negative consequences for himself. For relatively loud sounds, the upper limit is approximately 80 decibels. And sound vibrations reaching 130 decibels and more already cause a painful sensation in a person, and 150 become unbearable for him and can even cause death with prolonged exposure.The industrial noise level in production plants is very high. In many noisy jobs and industries, it reaches 90 to 100 decibels or more. It's also not much quieter in our homes, where appliances are the source of noise.
Each person perceives noise differently. Much depends on age, temperament, state of health, environmental conditions, characteristics of the organism. Some people lose their hearing even after brief exposure to relatively low intensity noise. Others can endure very loud noise exposure for a long time without any consequences.
In addition to negatively affecting hearing, constant exposure to noise can also cause other harmful effects - reduced physical activity and performance, ringing in the ears, dizziness, headaches, increased fatigue and general health problems.
Noise has the so-called cumulative effects, ie acoustic sound stimulation, which accumulates in the body and over time puts more and more stress on the nervous system.Therefore, quite often, before hearing loss from exposure to various noises, a functional disorder of the central nervous system occurs. Noise has a particularly harmful effect on the neuropsychic activity of a person.
It has long been noted that the level of neuropsychiatric diseases is higher in people working in noisy conditions than in people working in normal conditions, not associated with sound and noise overloads.
Noises cause various functional disorders of the cardiovascular system, have a harmful and often irreversible effect on visual and vestibular analyzers, reduce a person's reflex activity, which is often the cause of accidents and injuries at work.
It is known that inaudible sounds have a detrimental effect on human health. Infrasounds have a particularly strong impact on the human psyche: they affect all types of intellectual activity, the mood deteriorates, there may be a feeling of loss, anxiety, fear, fear, and with high intensity a feeling of weakness, such as a strong nervous or mental overload. It is not for nothing that secret laboratories in different countries develop various types of weapons that are based on the effect of sound waves on a person. This is undoubtedly one of the weapons of the future.
27 окт 2021
