what is the quietest portable generator

{"title":"2KVA 4.4L ISO 9001 Lightweight Portable Generator","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/8b\/2f\/c2c595da2a50cc90a336e01ea7fd-200x200-1.jpg","attrs":{"Price":"Based On Order","Brand Name":"DEHRAY","Model Number":"RIG2000","Minimum Order Quantity":"N\/M","Delivery Time":"20 Working Days","Certification":"CE, EURO V, EPA, ISO9001","Place of Origin":"CHINA","Payment Terms":"T\/T, L\/C, D\/P, Western Union, D\/A","Supply Ability":"500 Sets Per Week","Packaging Details":"Seaworthy Delivery Package\/ Wooden Package\/ Carton\/ Pallet","Product Name":"2KW Inverter Generator","Model No.":"RIG2000","Power Rate":"2KW","Rated Frequency":"50\/60 Hz","Rated Rotation Speed":"5000 rpm","Phase Number":"Single Phase","Engine Type":"Single Cyliner","Structure Type":"Air Cooled","Bore Stroke":"60\u00d740mm","Displacement":"0.113L","Starting System":"Recoil Starter","Noise Level":"62 dB(A)\/7m","Overall Dimensions":"530\u00d7290\u00d7430 mm","Net Weight":"23 kg"}}

{"title":"Household Quietest Portable Oxygen Concentrator O2 Generator For Home","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/16\/a8\/c96dbe334351bc693cc1deb9229b-200x200-1.jpg","attrs":{"Brand Name":"AMONOYhealth","Model Number":"ZY-2A","Minimum Order Quantity":"1Pieces","Delivery Time":"5-8 work days","Place of Origin":"Anhui, China","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union","Packaging Details":"carton packing 266*230*295MM","After-sale Service":"Online technical support","Noise Level":"less than 40dB","Product Size":"27*23*30cm","GW\/NW":"7.5\/6.5KG"}}