Sennheiser TR/HDR 120, 22 Hz to 19,500 Hz
This is not a success story. I set up the headphones on a desktop at HKNC. The phones came with batteries and adapters for the plugs. Setup was easy. I could not save the sound file, but I was able to play it from the email. The controls for volume and forward/rewind appeared in the email. One feature of the phones I did not like was the “tune” slide-wheel needed to optimize the signal between the transmitter and the phones. If not set just right the signal was less than strong.
I set the phones and the computer volume on maximum; there was no frequency controls. I tested the phones with on deafblind subject and on deaf subject. Hearing loss was severe-profound to profound. Both subjects did not wear hear aids. Neither subject could feel the vibrations from the phones during several sound playback. I removed the pads from each ear phone, but neither could feel the vibration. I asked the subjects to place there hands on the phones, but neither could feel the vibrations.
* It seems I could not get sufficient volume. Is it possible to create a file with significantly higher dB output? I would like to raise the volume and the lower frequencies.
* I plan to try ear buds. I have a pair from my iPod.
* A lighter or different phone material – which might reverberate better – might work.
There was literally no recognition from the subjects of any vibrations, even when focused on the task.
We might need to go to plan B for this. I am open to ideas and suggestions.