Establishing the amount and type of noise in the classroom is important to define in the Introduction: we talk about what affects the noise (RT/SNR/background noise level) Noise present in a school building is expected. Learning is not a peaceful activity and classrooms are therefore inundated with both internal and external noise. Internal noise refers to noise inside the school. These are students inside the classroom and walking in the hallways, HVAC systems, ______. External noise refers to any noise coming from outside the school building. This is commonly referred to as transportation noise, since the sources of noise are trains, airplanes, and automobiles. Industrial and construction noise can also contribute to external noise. To better define the noise present in a classroom, we need to observe the classroom acoustics when the classroom is unoccupied and compare it to when the classroom is occupied. Acoustic standards recommend that maximum background noise levels for classrooms less than 10,000 cubic feet not exceed 35 dBA. The reverberation time (RT) must not exceed 0.6 seconds (SOURCE ANSI). Unfortunately, many classrooms do not meet this recommendation. Knecht, etc. They all recorded background noise levels and reverberation time in 32 unoccupied classrooms in eight public school buildings. Noise levels ranged from 34.4 to 65.9 dBA with only four classrooms meeting the ANSI standard. The measured reverberation time ranged from 0.2 to 1.27 seconds. Thirteen classes met the RT guidelines established by ANSI (Knecht). It is critical that classrooms meet unoccupied guidelines as noise levels only increase with the addition of students and teachers. Little research has been conducted to measure noise levels during the school day. ... in the center of the paper ... on the walls and around the windows. Additionally, having landscapers mow the lawn when school is not in session will help keep outside noise levels low. Sound field systems can be installed in the classroom to help create a better listening environment for students. Dockrell and Shield installed speakers in classrooms at eight schools and compared student performance to those in classrooms without sound field systems. Define what noise may be present How this noise can affect children's speech recognition and learn what can be done about it conclusion - discuss/conclude more about the impact of ageA collaborative approach is needed to fix what is wrong.If you have need more content: On speech perception in primary school classrooms: article on the classification of acoustic interference and the influence of age - to be used after the paragraph on noise levels of occupied people