The early phase is characterized by multiple active cell groups including osteocytes, osteoblasts, and histiocytes. It develops a spongy appearance because of vascular dilation secondary to osteocyte resorption of bone surrounding blood vessels. This can be seen grossly as red hue behind the tympanic
Paracusis of Willis :Patients report improved speech understanding in a noisy environment.
Carhart’s notch is characteristic of otosclerosis and appears as a sensorineural hearing loss at 2 kHz that is spurious since the bone conduction in the mid-frequency range is not reliable.
Here are some important comments with regard to these figures: 1. The indicated gain values may be reached in full , because of the Adaptive Feedback Canceller. 2. The low battery consumption allows for a total operating time of, approximately: 77 hours for CIC with battery 10 143 hours for ITC with battery 312 255 hours for ITE with battery 13 3. N ote the wide frequency range effectively covering the frequencies which are important for speech understanding.
Here are some important comments with regard to these figures: 1. The indicated gain values may be reached in full , because of the Adaptive Feedback Canceller. 2. The low battery consumption allows for a total operating time of, approximately: 77 hours for CIC with battery 10 143 hours for ITC with battery 312 255 hours for ITE with battery 13 3. N ote the wide frequency range effectively covering the frequencies which are important for speech understanding.
Let’s look at ChannelFree precision in terms of an audiogram… Here we have the measured thresholds, but in reality the audiogram is probably not a straight line, And in red we have the UCL information. If we try to fit this audiogram with a 4 channel instrument, you can see that we have areas of overamplification and areas of underamplification, If we move to 16 channels, we have a better fit, but we introduce even more temporal smearing as we’ll see a bit later
Symbio XT’s ChannelFree system interpolates the gain where it is needed for accuracy. A little later in the talk I’ll show you how you control the gain where needed during a fitting.
![Background ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],The term otosclerosis is derived from the Greek words for “hardening of the ear.” Politzer first recognized otosclerosis in 1893](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)