a c frequency weighting decibel meter

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{"cid":"91223784","title":"Safe Low Decibel Children Bluetooth Headset Foldable Adjustable Headband,40MM Driver Stereo Earphone Support 3.5mm AUX for Study","imgUrl":"https:\/\/img.chinax.com\/nimg\/9e\/18\/e0550ddf25c16ae1c1c370172bcf-200x200-1.jpg","attrs":{"Price":"USD4.16Piece","Brand Name":"Hitech","Model Number":"HT-H7604","Minimum Order Quantity":"3000pieces","Delivery Time":"35-40 work days","Certification":"CE FCC","Place of Origin":"CHINA","Payment Terms":"T\/T","Supply Ability":"10000 Pieces Per Month","Packaging Details":"Each product in a color box, 20 pcs in a carton. Carton size: 470*320*415mm, G.W.: 7kg. Loading quantity: 20GP\uff1a4486 pcs, 40GP\uff1a9292 pcs\uff0c40HQ\uff1a10895 pcs","Material":"ABS plastic","Color":"Gray Blue Pink Green Purple","Stucture":"Foldable\uff0cAdjustable","Bluetooth version":"V5.4","Speaker impedance":"32\u03a9\u00b115%","Volume Limit":"\u2264 85dB","Wearing Method":"Headband-style","Special Design":"Cartoon Print","Customization Services":"Supports Custom Logo and Packaging","Charging port":"Type-C"}}