Questions tagged [fieldwork]

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4 votes
2 answers
109 views

Is there any bioacoustics research team(s) in New York City (USA)? [closed]

I'm a science journalist in New York City (USA) interested in reporting on bioacoustics research. Does anyone know of (or do!) any bioacoustic research in or near New York City (~3-hr drive)?
19 votes
6 answers
2k views

Can you have SoundTrap recorders as carry-on luggage in a plane?

I will be travelling in the field by plane with a SoundTrap recorder and its hydrophone. It will be an international flight (USA to Canada) with Air Canada. I am planning to take this as a carry on ...
7 votes
1 answer
75 views

Resources specific to bioacoustics fieldwork in terrestrial settings

I'm a practitioner who has come into bioacoustics from a non-ecology background, as my practice up to 2020 was largely confined to sound art, field recording and holistic aspects of acoustic ecology. ...
8 votes
2 answers
162 views

What amplitude do you use for playbacks?

When performing playback experiments with birds, is there a biologically relevant source level for song playbacks? I have read that a standard value is 90 dB @ 1 m, however I could not find a good ...
  • 882
10 votes
5 answers
64 views

Where do you put a terrestrial recorder if you have no freestanding structures to attach it to, and also can't put a stake in the ground?

I have a terrestrial acoustic monitoring situation that presents two challenges: Acoustic monitoring is being conducted in an area with limited options for attaching the units (i.e., very few ...
11 votes
2 answers
65 views

Pros and cons directional mic vs parabola

While searching through the bird song literature, I realized there are two schools for recording songs. Some people use a directional microphone and some people use a parabola. I was wondering why to ...
  • 882
18 votes
4 answers
81 views

Using a Raspberry Pi (Or Similar) to build an underwater recording device?

I am curious if anyone has had any experience building an acoustic recorder from a small, cheap computer like a Raspberry Pi. I have a detection algorithm I wrote in Python and I know can run on an ...
  • 3,428
7 votes
3 answers
49 views

leaving mics in a cave during fieldwork

I'm recording bats in a cave with many small (Knowles SPU-0410), and big (Sanken CO-100) mics. The cave is mostly isolated from the outside, with a temperature between 10-15C inside, and it could get ...
  • 3,958
7 votes
1 answer
51 views

Reliable lousdpeaker for low frequency noise playback?

For an experiment on the impact of traffic noise on bird behaviour, I tried to playback some low frequency traffic noise with a fixed amplitude. While (trying to) adjust the noise amplitude, I ...
  • 882
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 ...
  • 3,958
5 votes
1 answer
22 views

Methods to segment CF and FM components of a call?

I have single-channel recordings of horseshoe/rhinolophid bats which have call shapes with a 'tabletop' or 'staple-pin' shape. (See spectrogram below). The flat portion is the 'constant-frequency' ...
  • 3,958
14 votes
6 answers
86 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 ...
  • 3,958
8 votes
3 answers
67 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 ...
  • 3,958
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 ...
  • 3,958
5 votes
2 answers
53 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 ...
  • 3,958