Participants were randomly divided into intervention (30 patients) and control (30 patients) groups. At first, obtaining written informed consent from participants is a signature on a form. After that, through interview and review of patient record, personal demographics, individual health status and diseases was completed. Before the procedure, level of blood pressure (systolic and diastolic) and Pulse rate (per minute), through “mobile vital signs monitor”, was recorded for all subjects by the second investigator who was unaware of the intervention and control groups. Also, the visual analog scale (VAS) and the anxiety questionnaire (The Spielberger State-Trait Anxiety Inventory (STAI)) through interview and patient self-report were filled. Patient, at the Bronchoscopy room, was on the bed with supine position so that the bed under the patient's head was 30 degrees angle. In the intervention group, at the same time, the patient was put on headphones to listen to music and nature images on the screen via video projector, ten minutes before the start to the end of Bronchoscopy, was broadcast. During Bronchoscopy for both groups, blood pressure and pulse rate were recorded every three minutes (after the third, sixth and ninth). After the end of Bronchoscopy, The third part of the questionnaire was completed by the researcher for all participants in the test. Finally, after the patient calm and before leave the Bronchoscopy room, patient tolerance was recorded by visual analog scale (VAS) for tolerance indices during bronchoscopy. The anxiety questionnaire that was delivered to the patient by a second researcher was filled with interviews and self-reports by patients. Also blood pressure and pulse rate were recorded.