Hi Dr. Treeby and Dr. Cox,
I have two questions about the frequencies in k-Wave.
(1) what is the difference between the kgrid.dt and the maximum temporal frequency f_max in k-Wave?
(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
k-Wave
A MATLAB toolbox for the time-domain
simulation of acoustic wave fields
The difference between the kgrid.dt and the maximum temporal frequency in k-Wave
(5 posts) (3 voices)-
Posted 7 years ago #
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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 7 years ago # -
Hi Dr. Treeby,
Thanks for your reply.
Lirj
Posted 7 years ago # -
Dear Dr.Treeby,
I have the same question. I am working on m-file "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 4 years 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 4 years ago #
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