It’s answer from Oticon Denmark:
I used the audio you provided, thank you!
Please refer to the document attached.
I initially entered the Bone conduction values for only the left ear in Genie 2 (so you can see how that translated into differences in the prescription in the lows between the 2 ears). Both Genie 2017 and Genie 2 try to take a seemingly air-bone gap into account in the low frequencies for both SP and Dynamo and add gain up to 750 Hz; (I compared all 3 devices but it’s a closer ‘comparison’ with Dynamo 143/82 BW 100-6500 and Xceed SP, 143/83 and BW 100-6500, also same battery size). Both were set to the default rationale of DSE.
I also see that the peak of the response in Xceed is between 1500-2K, while with Dynamo its closer to 1-1500 Hz. Of course the inside hardware, ie, the receivers are different between the 2 different product families. Xceed wasn’t developed to be a copy of the Dynamo response, and of course with OpenSound Optimizer, there should be more headroom too and the slightly higher MPO’s in Xceed reflect that, as well as the extra gain for soft inputs.
Your question was: “XCEED SP and UP prescribes less amplification in midtones compared to DYNAMO SP for same customer with profound hearing loss.” my findings don’t support that:
At 1K, there is a slight difference in prescribed gain:
At 1K, Dynamo prescribed MPO of 134, and gain for loud/mod/soft as 53/59/65
At 1K, Xceed SP prescribed MPO of 138, and gain for loud/mod/soft as 50/57/61
At 1.5, more gain for SOFT with Xceed SP:
At 1.5K, Dynamo prescribed MPO of 129, and gain for loud/mod/soft as 57/63/63
At 1.5K, Xceed SP prescribed MPO of 130, and gain for loud/mod/soft as 57/64/70
At 2K, Xceed offers a higher MPO and gain for all 3 input levels:
At 2K, Dynamo prescribed MPO of 126, and gain for loud/mod/soft as 57/57/57
At 2K, Xceed SP prescribed MPO of 136, and gain for loud/mod/soft as 63/65/65
You also noted:” XCEED gives more amplification than Dynamo only on LOW freqs”; yes that seems to be true
At 250 Hz, Dynamo prescribed MPO of 117, and gain for loud/mod/soft as 26/32/37
At 250 Hz, Xceed SP prescribed MPO of 127, and gain for loud/mod/soft as 32/38/44
Overall, the curves of Dynamo and Xceed SP are different due to different receivers, even with the same rationale applied (DSE); Xceed offers the availability of additional gain due to OSO esp in the mid freqs. The extra fitting bands in Xceed should offer a bit more fitting flexibility. Real ear measurements might reflect if the differences in the peaks/freq response of the products result in notable differences in the patient’s ear.
I’m not sure if I’ve fully responded to your concerns; I know it’s hard to compare old and new products, even if they look similar on paper or not. If I get any additional info from colleagues in Denmark I will share that as soon as possible!