Product Name: Professional Hearing Test Audiometer Ent Audiometer with Factory Price Model NO.: CH-A Conduction Mode: Bone and Air Conduction Application: Children, Adult, Elderly Condition: New Certification: ISO, UL, RoHS, CE Trademark: ICLEAR Origin: China Product Description Professional Audiometer★ Ideal for hearing screening work in schools, medical centers, hospitals, rehabilitation center, and enterprises etc.★ Stylish appearance design, lightweight, portable and convenient, built-in battery.★ Test function: air conduction (AC), bone conduction (BC). Free sound field(SPK)★ With built-in microphone, easy to communicate with the tester.★With standard USB 2.0 data interface, the audiometry data can be saved after connecting to the workstation. According to the National Occupational Health Standard of the People's Republic of China, it can analyze and generate a professional noise diagnosis report.★ Custom report Logo and name can be set through the workstation, and A4 or B5 format report can also be generated.Frequency and maximum output intensityFrequencyAC dB HLAC dB HLBC dB HLHzTDH39Ear-Tone 5AB711256060/2501001054550012011060750120115601000120120701500120120702000120120703000120120704000120115606000110100800010095Technical ParametersChannels:Two independent output channelsAir conduction:Frequency: 125Hz~8000Hz;Hearing level:-10~110Db.Bone Conduction:Frequency:250Hz~6000Hz.Hearinglevel:-10~60dBThe allowable errorof frequency:±2%.Test Signal:Pure tone, Pulse, Warble tone, Narrow band noiseMicphone:With built-in microphone, easy to communicate with the tester.Display screen:LCD display,Precise numerical displayDistortion factor:Air conduction less than 2.5%,bone conduction less than 5.5%Masking:Air conduction and Bone conduction Contralateral MaskingThe accuracy:Continuous attenuation/Step 5dB,error 1dB.Protection Function:Protect the tester's hearing from damage as far as possibleComputer interface:USB 2.0 data transmission interface, can be connected with PCfor printing test reportonline Diagnosis:self-analysis and generation of occupational noise-induced hearing loss diagnosis report according to the"National Occupational Health Standards of the People's RepublicofChina"Operating environment:Temperature 10 ºC ~ 40 ºC, Relative humidity 30%~ 90%,Pressure 86 kPa ~ 106 kPaWarm-up time:5 to 10 minutesMean time between failures ≥1000hHost size:43cm*30cm*11cmPortable, lightweight:the host weight2.44G,the gross weight 6KGPower adapter:Input 100V-240V ~ 50/60Hz 1.5A; Output DC 12V/4ABuilt-in battery:nominal voltage 7.4V/5000mAh; continuous operation≥8hours,standby operation mode≥ 1 weekOutput:TDH 39 Air Conduction Earphone, B71 Bone ConductionEarphone.Safety standard:GB 9706.1-2007 GB/T 14710-2009Audiometerreference standard:GB/T 7341.1-2010 JJG 388-2012Production license number:Guangdong Food and Drug Administration Production No.20091764Standardaccessories:TDH39 Air ConductionHeadset, B71 Bone Conduction Headset, Transponder,Power Cable, USB Data Cable, PCSoftware,Audiogram.