Performance and Safety of the Pneumoscope Device in Adults and Children

Patients will be recruited from the pediatric and adult clinical departments of the Geneva University Hospitals. Inclusion Criteria: * Age \> 1 year old. * Healthy patients on the day of auscultation OR * Patients with lower respiratory tract diseases (e.g., bronchitis, pneumonia, etc.). OR * Patients with low (i.e., \<92%) pulse oximetry values (e.g., cyanotic heart defect such as tetralogy of Fallot, transposition of great vessels, etc.). AND / OR * Patients with fever \>38.0°C. * And for all: Information and written consent of the patient or a legal representative. Exclusion Criteria: * Refusal of consent. * Clinical signs of severity: acute hypoxia, hypercapnia, acute respiratory failure, acute circulatory failure. * Immune disorder, primary ciliary dyskinesia, antecedent of neonatal bronchopulmonary dysplasia. * Contraindications and limitations of the MD as described in the instructions for use. * Contraindications to the class of medical devices being studied, e.g. known hypersensitivity or allergy to the device material. * Clinically significant concomitant disease states. * Inability to follow the study procedures, e.g. due to language problems, psychological disorders, dementia, etc. * Participation in another study with an investigational drug or other medical device within 30 days prior to and during the present study.