Questions tagged [experiment-design]

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6 votes
3 answers
50 views

Recommandation to design a fish tank for acoustic experiments

Hi Bioacoustic community, We have been doing several experiments in fish tanks to identify fish sounds. However, the resonance degrades a lot the signal recorded with the hydrophone. The resonance ...
4 votes
1 answer
49 views

Shotgun microphone position for low-level sounds in a tube

I would like to record extremely low sound-level (at ~200-300Hz), produced by an insect which is located at the end of a plastic tube, with a very-sensitive low-noise shotgun pressure microphone (this ...
  • 3,910
15 votes
3 answers
66 views

Locating birds by their calls with improvised equipment. Can algorithms rescue this setup?

In winter, I can usually hear one or two birds in an area, and I occasionally see them flitting through the air – but it's usually too dark to see them except in motion, silhouetted against the sky. ...
  • 383
7 votes
1 answer
44 views

Measurements to know if my field-recordings are good?

Fieldwork means having all the equipment in place to record the animals (in my case bats) when I see them. I try to look at the audio as soon as they're recorded to check if the settings are okay. I ...
  • 4,010
14 votes
6 answers
89 views

Estimating distance accurately in the field for bird call source levels?

I'd like to estimate the distance at which the bird is singing from the point of recording, to then finally get the source level from one microphone. I've seen studies, and heard from colleagues use ...
  • 4,010
15 votes
2 answers
88 views

I have electronic noise in my bird call recordings. How do I account for this noise while performing measurements?

My recordings of bird calls have multi-harmonic noise (probably generated by some electronic device e.g. as mentioned here). I would like to perform peak-frequency and other such spectral measurements....
  • 4,010
10 votes
2 answers
87 views

Are consumer grade USB audio interfaces 'safe' to use for bioacoustics recordings?

I've been seeing many relatively affordable USB audio interfaces (even multichannel ones, in fact) with >= 96 kHz sampling rates. These seem like a cost-effective alternative to some of the more ...
  • 4,010
8 votes
3 answers
68 views

how do I get rid of multi-harmonic lines in my recordings?

I'm using a DC-AC converter to run my audio-interface in the field. Everytime I use the converter to make recordings i see strong multi-harmonic 'lines' in my spectrogram. In the lab (when connected ...
  • 4,010
2 votes
2 answers
23 views

software to trigger and run recordings with USB soundcards

I'm looking to trigger recordings as bats pass by my mic array.l, and also to potentially run playbacks too through the soundcard (it has both ADC and DAC capabilities). I have an ASIO based USB ...
  • 4,010
4 votes
1 answer
41 views

I need to measure the target strength of an animal. What to consider while setting up the experiment

I need to estimate the distance at which bats can detect each other through echolocation. To do this I need to measure the target strength of a bat. I currently have a taxidermy bat, ultrasound ...
  • 4,010
5 votes
2 answers
56 views

Will be recording vocalisation of an understudied species, with 192 kHz is my sampling rate high enough?

I will be performing echolocation call recordings of an understudied bat species that roosts in caves. Many studies use very high sampling rates (>=384 kHz), but I currently only have a sound card ...
  • 4,010