Differences

This shows you the differences between two versions of the page.

Link to this comparison view

Both sides previous revision Previous revision
Next revision		 Previous revision
tips:recording_ultrasound [2023/08/29 15:03] – mrkvatips:recording_ultrasound [2023/08/31 16:27] (current) – mrkva
Line 7: Line 7:
 To get started, you'll need a recorder capable of recording at a sample rate of 96 kHz or 192 kHz. The latter is preferred. The theoretical limit you can capture with a 96 kHz sample rate is half of that – 48 kHz. With a 192 kHz sample rate, you can record sounds up to 96 kHz. Keep in mind that this is a theoretical limit based on [[https://en.wikipedia.org/wiki/Nyquist–Shannon_sampling_theorem|the Nyquist-Shannon theorem]], and real-world performance can vary. To get started, you'll need a recorder capable of recording at a sample rate of 96 kHz or 192 kHz. The latter is preferred. The theoretical limit you can capture with a 96 kHz sample rate is half of that – 48 kHz. With a 192 kHz sample rate, you can record sounds up to 96 kHz. Keep in mind that this is a theoretical limit based on [[https://en.wikipedia.org/wiki/Nyquist–Shannon_sampling_theorem|the Nyquist-Shannon theorem]], and real-world performance can vary.
  
-Secondly, you'll require microphones capable of capturing ultrasonic content. LOM Uši, mikroUši, and basicUcho series microphones are suitable for recording ultrasonic sounds, and we encourage you to test them for this purpose. In terms of performance (signal-to-noise ratio at higher frequencies), mikroUši is the best, followed by Uši, and basicUcho series performs the least. However, all of them can capture common bat sounds without any issues.+Secondly, you'll require microphones capable of capturing ultrasonic content. LOM Uši, mikroUši, and basicUcho series microphones are suitable for recording ultrasonic sounds. In terms of performance (signal-to-noise ratio at higher frequencies), mikroUši series is the best, followed by Uši, and basicUcho series performs the least. However, all of them can capture common bat sounds without any issues.
  
 For your first subject, you can use a very basic ultrasonic generator – keys. By shaking a set of keys, you can generate bursts of ultrasound reaching almost 80 kilohertz! However, don't let the audible part of the sound fool you; there's a lot of content you simply can't hear. For your first subject, you can use a very basic ultrasonic generator – keys. By shaking a set of keys, you can generate bursts of ultrasound reaching almost 80 kilohertz! However, don't let the audible part of the sound fool you; there's a lot of content you simply can't hear.
Line 31: Line 31:
  
 {{:tips:mikrousi_bats_original.png?nolink&400|}} {{:tips:mikrousi_bats_sloweddown.png?nolink&400|}} {{:tips:mikrousi_bats_original.png?nolink&400|}} {{:tips:mikrousi_bats_sloweddown.png?nolink&400|}}
 +
 +===== Interesting links =====
 +  * [[https://www.wildmountainechoes.com/equipment/options-for-recording-ultrasounds/|Options for recording ultrasounds]] by Wild Mountain Echos
 +  * [[https://thomasrexbeverly.com/products/bat-echolocation|Bat echolocation sound effect library]] by Thomas Rex Beverly
 +