Middle Ear Analyzer DM20
Tympanogram test、Complete/perforated eustachian tubefunctionaltest
Sound reflection test、Acoustic reflection attenuation testAcoustic refles latency test
Quick test: Two user-defined quick tests can be generated,with the test time 60s
With the "Live View" feature, you can see a panoramic view ofthe testin progress on your computer screen
Color touch screen + touch button with working mode
Sound of probe 226Hz (85dB SPL)
Range of measurement 678Hz, 800Hz, 1000Hz (optional)
Total harmonic distortion The measurement plane tympanograms were: 0.2cm3-5cm tympanograms of the external ear were: 0cm3-2cm3
< 1%[226Hz (85dB SPL)]
Stimulation level up to 110dB, no more than 5% (headphone probe)
Automatic testing Rapid test A and B (Tympanogram measurement and acoustic reflex sequence)
Range of pressure 600 to +400daPa
Pump pressure rateAutomatic range
15, 50,100,200,300,400,600 daPa/ s200-600dapa /sec
Automatic range
Pump control Automatic and manual
Tympanogram：Test mode: acoustic admittance, (Y), sonar (B), acoustic conductance (G) Maximum pressure range :-600~+400daPa
Eustachian tube：Intact Tympanic tube Test (ETF-TM intact) Perforated tympanic tube test (ETF-TM perforated)
acoustical reflection：Test mode: fixed intensity, automatic threshold, increasing intensity, manual maximum allowable error: not more than 1%
Acoustic attenuation test
Acoustic reflex latency Test (ARLT)
stimulation ：Ipsilateral and contralateral
The hearing range ranged from 50dB to 100dB at the stimulation level of 500Hz to 2000Hz
The stimulation level was 4000Hz
The hearing range ranged from 50dB to 80dB
BBN (broadband noise), LPN (Low-pass noise), HPN (high-pass noise)
The loudest intensity was 110dB HL on the ipsilateral side and 120dB HL on the contralateral side
