SLP Model Development in the Diagnosis of COPD Patients

Inclusion Criteria: * Any adult (≥18 years old) who has been diagnosed with COPD guide GOLD criteria (FEV1/FVC ratio post bronchodilator \<0.70) * Healthy Smokers (≥35 years old, current or ex-smoker with a history of ≥10 pack years (20 cigarettes smoked per day for 10 year)) Exclusion Criteria: * Be unable to sit in an upright position for required period * Have had deteriorated COPD symptoms since the last spirometry unless willing to undergo spirometry testing * Have significant co-morbidities (i.e. Chest work or spinal deformity, OSA, AHI \>30 secs * Any other significant disease or disorder which, in the opinion of the investigator, may either put the participants at risk because of participation in the study, or may influence the result of the study, or the participants' ability to participate in the study * Height \> 194 cm * BMI \>40 * Female participant who is pregnant, lactating or planning pregnancy during the course of the study * Be unable to consent or comply with the study protocol