k-Wave

1. lirj
   

   Member
   Joined: Jan '15
   Posts: 9

   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

   Posted 6 years ago #

2. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,640

   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 6 years ago #

3. lirj
   

   Member
   Joined: Jan '15
   Posts: 9

   Hi Dr. Treeby,

   Thanks for your reply.

   Lirj

   Posted 6 years ago #

4. NE2019
   

   Member
   Joined: Jan '20
   Posts: 3

   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
   Neb

   Posted 4 years ago #

5. Bradley Treeby
   

   Developer
   Joined: Mar '10
   Posts: 1,640

   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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