Is there any way to High sampling rate without no obstacles

[uecken]

I tried "duration(10000)", but this function only return 0 if timeout occurs.
Now, Ultrasonic transmitting frequency is not so high in case no obstacles, that's is about 32ms.

Is there any way to get high sampling rate?
I know that previous transmitted ultrasonic affects the next measurement.

[Lesords]

Hello,

I'm very sorry to have kept you waiting so long.

Do you still have this problem now?

[Lesords]

Hello,

I'm going to close this issue, feel free to re-open it if you have any other questions.

[Autocommentary]