Check out this gallery from Detroit Free Press:

Michigan native makes headphones for anxious dogs

https://www.freep.com/picture-gallery/news/local/michigan/detroit/2022/06/28/michigan-native-makes-headphones-anxious-dogs/7602013001/

Dog hearing range is 40hz to 60khz, which means that electrostatic headphones are obviously the way to go. Doing it wrong imo.

I thought Sony already cornered that market - otherwise I can't imagine why they would brag about frequency response of up to 100khz!

 

https://www.sony.com.au/electronics/headband-headphones/mdr-z7m2

I think Sony went for a different solution. 

On 6/28/2022 at 10:52 PM, catscratch said:

Dog hearing range is 40hz to 60khz, which means that electrostatic headphones are obviously the way to go. Doing it wrong imo.

No need to go any lower as the dog is the woofer.