T840 header image 1


 T840: screening tympanometer with ipsilateral and contralateral reflex testStreg Forside

Streg Forside 

T840 and T830 flyer 


Flyer and datasheet


User guide for T830 and T840 image


Instructions for use





T840 gives you everything you need for detailed and efficient screening tympanometry. Perform ipsi-and contralateral testing. Benefit from the on-screen assistant, which guides you quickly through testing procedures, and review test results in two different view modes for compliance curve.


Improve your workflow and dedicate more time to patients

The T840 is ready for testing in less than 10 seconds and provides a compliance curve with ipsilateral and contralateral reflex test results in less than one minute per ear. This gives you more time to focus on your patients.


Compact and robust design for use in any location

T840 is a smart solution for the clinic or on the go. With a solid aluminum casing and resilient probe cable, it is lightweight, compact and robust – ready to withstand daily use and transportation.


Stand-alone and PC-based operation 

 DualControl color  AC DUAL CONTROL FOR wev  AC logo

Oscilla® T840 features DualControl technology for full operational flexibility. The operator can switch between stand-alone operation and PC-based operation with Oscilla® AudioConsole software. AudioConsole is not a part of the standard T830 package and must be purchased separately. Read more about DualControl.



Technical specifications


Air pressure

-300 daPa to +200 daPa


Probe tone frequency

226 Hz ± 1%


Probe tone amplitude

85 dB SPL ±  3 dB


Frequency (ipsilateral)

500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz


Level (ipsilateral)

80 dB to 110 dB HL 


Frequency (contralateral)

500 Hz, 1000 Hz, 2000 Hz, 3000 Hz, 4000 Hz


Level (contralateral)

80 dB to 110 dB HL


Integrated memory

100 tests 


PC connection




7.2" colour 



330 x 220 x 55 mm



1300 g




Test options


Pure tone

Ipsilateral reflex test

Contralateral reflex test




Standard package includes


T840 device

Probe 226 Hz

Contralateral headset

Calibration cavities

Eartip set

Power supply

Instructions for use  



Optional extras

Carrying bag

USB cable 

AudioConsole software