Hi Dr. Treeby and Dr. Cox,
I have two questions about the frequencies in kWave.
(1) what is the difference between the kgrid.dt and the maximum temporal frequency f_max in kWave?
(2) what is the relationship of the input signal frequence "tone_burst_freq" and the above two parameters in (1)? How to set the "tone_burst_freq" is the most reasonable when we conduct a simulation of ultrasound.
We hope you can help us to solve these questions. Thanks!
Best regards!
Lirj
kWave
A MATLAB toolbox for the timedomain
simulation of acoustic wave fields
The difference between the kgrid.dt and the maximum temporal frequency in kWave
(5 posts) (3 voices)
Posted 2 years ago #

Hi Lirj,
f_max is the maximum frequency supported on the spatial grid. This is explained in more detail in Section 3.4 of the user manual  let me know if anything doesn't make sense. The tone burst frequency should be set to the centre frequency of the transducer that you are trying to replicate (e.g., 3 MHz). In general, you should use at least 3 points per wavelength at the highest frequency of interest.
Brad.
Posted 2 years ago # 
Hi Dr. Treeby,
Thanks for your reply.
Lirj
Posted 2 years ago # 
Dear Dr.Treeby,
I have the same question. I am working on mfile "example_pr_2D_TR_circular_sensor.m", and I need to know the frequency and bandwidth of sensors (a default that they are working).
I will appreciate it if you help me to know that.Thanks
NebPosted 2 weeks ago # 
Hi Neb,
The maximum frequency supported by the simulation is given by
f_max = c_min / 2 * dx
. If you have a point detector, it will have a flat frequency response. You can read more information in the manual. Let me know if something doesn't make sense.Brad
Posted 15 hours ago #
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