Please assess the completion status of the following clinical trial:

Trial Title: The Effects of Background Noise for Adult Patients' Sleep Quality in Intensive Care Unit.

Study Design Characteristics:
- Allocation: RANDOMIZED
- Intervention Model: PARALLEL
- Observational Model: None
- Primary Purpose: SUPPORTIVE_CARE
- Time Perspective: None
- Masking: NONE
- Phase: None
- Number of Arms: 2.0

Eligibility Criteria:
Inclusion Criteria:~* Age must be greater than or equal to 20 years old.~* Admitted to the ICU and have been intubated for at least 24 hours.~* Aware of people, time, and place, and without hearing impairment.~* Be able to communicate in writing.~* The Glasgow Coma Scale score must be equal to or greater than 11, with a vocal response of 1 in the patient post-endotracheal tube placement.~Exclusion Criteria:~* History of insomnia, Alzheimer's disease, or depression.~* Routine use of sedative-hypnotic drugs (opioids, benzodiazepines, non-benzodiazepines, antihistamines, and melatonin) before admission.~* Post-operation in the operating room before ICU admission.~* ICDSC score of at least 4 or CAM-ICU positive.

- Gender: ALL
- Minimum Age: 20 Years
- Maximum Age: None
- Healthy Volunteers: f

Study Arms:
- background noise group (Type: EXPERIMENTAL): Background noise at bedtime.
- conventional treatment group (Type: NO_INTERVENTION): Treatment as usual.

Based on this trial design, predict the completion outcome and termination type (if applicable).