“…Taking into account merely the most common source of noise which is the road traffic, analyzing the data included in the acoustic maps and measurements performed by the Chief Inspectorate of the Environmental Protection in the year 2013 [2] in Poland we can state that 66% of the examined roads are characterized by the level of noise emission above 65 dB L AeqD in daytime, and on 78% of roads the noise level exceeds 56 dB L AeqN during night time. Additionally, the sonic environment includes also the noise generated by industry [3][4][5], aircraft, wind turbines [6,7], railways, craft services, farms, playgrounds, municipal facilities, renovations, and household appliances [8]. What is more, the presence of noise from several sources makes segregation of sounds by the ear difficult [9].…”