Noise pollution in hospitals is a growing problem. The World Health Organization (WHO) has recommended a noise limit of 35 dB for average hospital sound levels and 40 dB at night [1]. Emergency departments are frequently exposed to noise levels exceeding the WHO recommended thresholds [2]. Excessive noise in the emergency department is a significant problem in the hospital environment that can significantly impact the well-being and safety of both patients and staff [2]. It has been stated that low noise levels in the emergency department have a positive effect on the well-being of healthcare personnel and the efficiency of patient care [3]. Working conditions in the emergency department can be significantly challenging due to monitor noises, interpersonal conversations, and ambulance sirens [4]. Noise, an unwanted and disturbing sound, is a common problem among hospital staff, patients, and their families. Noise is considered an environmental stressor for human health and can negatively impact staff communication, comfort, productivity, job satisfaction, and performance [[5], [6], [7], [8]].

One of the negative effects of noise in the hospital environment is the attention deficit it creates in healthcare professionals. Inattention is a disorder characterized by symptoms such as forgetfulness, inability to complete a task, inability to distinguish between important and unimportant tasks, inability to prioritize tasks, lack of organization, being easily distracted by external stimuli, making hasty decisions, and ignoring details [9]. Studies in operating rooms and intensive care units have shown that noise causes attention deficit in healthcare professionals, increases error rates, and negatively impacts information processing [[10], [11], [12]].

Emergency services are complex units that provide 24-hour service and respond to a variety of patient situations. They are ready to respond to any emergency, whether urgent or non-urgent [13]. Emergency department nurses are responsible for the assessment, management, and safety of the care of patients of all ages, with different clinical emergencies and severity levels. They provide complex care by making clinical decisions in a stressful, short time, and crowded environment [14]. For this reason, how the nurse can provide individualized care in the emergency department is still an important issue discussed in the literature [[15], [16], [17]]. Individualized care includes unique nursing care that takes into account the values and needs of each patient and is based on the understanding that patients are unique individuals. Individual-centered care plays a key role in terms of quality care, patient safety, and satisfaction even in challenging and complex emergency department environments [17]. Appropriate noise levels and nurses' attention levels in emergency departments will also positively impact individualized care.

No studies have been found in the literature that examine the noise sensitivity, attention deficit/hyperactivity disorder, and individualized care behaviors of emergency department nurses together. Therefore, this study is believed to make an original contribution to the literature. Therefore, this research was conducted to examine the noise sensitivity, attention deficit/hyperactivity disorder, and individualized care behaviors of emergency department nurses.