Patients in the control group will only be subject to the hospital's current standard care protocol. The procedures performed within the scope of this protocol include routine practices such as informing the patient, making the necessary medical preparations, and providing basic nursing interventions during the procedure. After the colonoscopy procedure is completed, the patient will be taken out of the endoscopy room and taken to the rest area where they will rest for 10 minutes in a quiet environment. At the end of this period, the VAS and VAS-A forms will be filled in again by the researcher and post-procedure pain and anxiety levels will be measured.

In this group, patients will listen to white noise via headphones in addition to the hospital's standard care protocol prior to and during the colonoscopy procedure, as directed by the researcher. White noise is a type of sound that contains equal intensity sound across the entire frequency spectrum and suppresses environmental sounds that distract the individual by masking external noise. Patients will choose one of three compact discs containing white noise (babbling brook, distant thunderstorm, soothing rain; Pure White Noise, Windsor, CO). The patient will listen to the noise via headphones for 20 minutes before the colonoscopy begins. It will continue uninterrupted throughout the procedure, and pain will be assessed with VAS and anxiety levels will be assessed with VAS-A during the procedure. The sound level will be adjusted to predetermined safe levels so as not to disrupt the patient's comfort. After the colonoscopy procedure is completed, the patient will be taken out of the e

In addition to the standard care protocol, the patients included in this group will listen to pink noise through headphones as directed by the researcher. Pink noise is a sound form that is dominated by low-frequency sounds and provides a more natural, soft acoustic environment. Sounds similar to sounds in nature (e.g. wind, rain, ocean waves) are included as pink noise. The patient will listen to pink noise through headphones for 20 minutes before the colonoscopy begins. It will continue uninterrupted throughout the procedure. During the procedure, pain will be assessed with VAS and anxiety levels will be assessed with VAS-A. The sound level will be adjusted to predetermined safe levels so as not to disrupt the patient's comfort. After the colonoscopy procedure is completed, the patient will be taken out of the endoscopy room and taken to the resting area where they will rest for 10 minutes in a quiet environment. At the end of this period, the researcher will fill in the VAS and VAS

In addition to the hospital's standard care protocol, patients in this group will listen to white noise through headphones before and during the colonoscopy procedure, as directed by the researcher.

VAS-A is a single-item measurement tool that has been used for psychological assessment since the beginning of the 20th century. It is frequently used in the assessment of pain, quality of life and mood. It was developed by "Cline et al" (1992) and is extremely simple, reproducible and requires minimal tools. The scale consists of a 10 cm long horizontal line with the labels "No anxiety" on the left and "I feel a lot of anxiety" on the right. The patient's anxiety level is calculated by measuring the distance between the leftmost part of the scale and the specified point. As the anxiety level approaches 10, anxiety increases.

VAS-A is a single-item measurement tool that has been used for psychological assessment since the beginning of the 20th century. It is frequently used in the assessment of pain, quality of life and mood. It was developed by "Cline et al" (1992) and is extremely simple, reproducible and requires minimal tools. The scale consists of a 10 cm long horizontal line with the labels "No anxiety" on the left and "I feel a lot of anxiety" on the right. The patient's anxiety level is calculated by measuring the distance between the leftmost part of the scale and the specified point. As the anxiety level approaches 10, anxiety increases.

The Visual Analog Scale (VAS) is a single-dimensional scale commonly used to measure pain intensity. VAS is a measuring tool with a length of 0-10 cm (0-100 mm). This measuring tool can be used horizontally or vertically. The scale starts with "no pain" and ends with "unbearable pain". High scores obtained from the scale indicate high pain intensity. The cut-off points for pain scores obtained from the scale are recommended as 0-4 mm "no pain", 5-44 mm "mild pain", 45-74 mm "moderate pain" and 75-100 mm "severe pain".