Questions tagged [microphone]

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6 votes
1 answer
38 views

What options are there for micro audio recorders?

I'm in the process of purchasing gear for this upcoming field season and am looking for audio recorder recommendations. I'm hoping to place ~30 small recorders in seabird rock crevices to record ...
  • 121
4 votes
1 answer
20 views

Song Meter vs AudioMoth PAM performance

I'm assembling a PAM field kit for the upcoming breeding season in the temperate rainforest ecoregion of Washington, USA, and would love to learn about your experiences with different ARU (Autonomous ...
5 votes
2 answers
18 views

Mic Recommendations for Hummingbird Chip Notes?

I am doing my honors thesis on Anna's Hummingbird chip notes. I need to capture clean chip notes in the field. They are pretty distinct vocalizations, but part of my research is quantifying the ...
10 votes
2 answers
80 views

How long do hydrophone (/microphone) calibrations last for?

A colleague asked the room this the other day and nobody could confidently answer this... How long, after an acoustic sensor has been calibrated, is its calibration curve trustworthy for? There was ...
  • 3,470
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
6 votes
2 answers
61 views

Recording of whitefly vibrations: "piezo" versus "low-noise microphone with subtrate-air diffusion"

Whiteflies communicate before and during mating through abdomen oscillations which vibrations are believed to propagate mostly in the leaf (~100-400 Hz). They are very low-energy signals which are ...
  • 3,910
6 votes
2 answers
86 views

Equipment recommendation for sound source localisation

Do you have any recommendation for multichannel equipment for source localization? What parameters should I consider for the microphones, for the recorder? Also any advice for starting multichannel ...
  • 1,452
9 votes
3 answers
53 views

Recommended wind screen for MEMS microphones

Some folks in my lab are using Wildlife Acoustics Song Meter Mini sensors in a very windy grassland environment and having recordings get messed up by wind noise. Has anybody here had good luck with ...
  • 1,162
17 votes
3 answers
128 views

Recommendations for external microphone for smartphone for casual recordings (birds, frogs, bats if possible?)

I would like to get a better microphone for my smartphone for recording wildlife around my home and when out camping. This question asked about very inexpensive accessories, but in this case, I am ...
  • 3,229
11 votes
2 answers
77 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 ...
  • 912
10 votes
2 answers
44 views

Bumped into acoustic array during fieldwork - localisation issue?

While walking backwards in the dark, I bumped into my 4-channel inverted T-shaped acoustic array placed on a tripod. The array has a central mic with 3 peripheral mics at 60 cm Radius at 120 deg ...
  • 4,010
7 votes
3 answers
51 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 ...
  • 4,010
11 votes
3 answers
62 views

Microphone calibration stability?

I've always wondered how 'stable' microphone frequency response and sensitivities are? In particular, I'm not talking about the high-end (GRAS/B&K/others) calibration microphones, but rather '...
  • 4,010
10 votes
1 answer
53 views

Software packages to run microphone frequency-response calibrations?

I will need to measure microphone frequency responses in the coming weeks. In the past I have always used scripts I wrote or written by colleagues. They seemed to work, but required tweaking each time ...
  • 4,010
8 votes
2 answers
88 views

How reliable are "particle-velocity" microphones?

For studies with insects which are sensitive to air particle-velocity, so called "particle-velocity" microphone are used (e.g. here, here, here, here). However, they are not truly particle-...
  • 3,910
7 votes
2 answers
73 views

Is it possible to estimate particle velocity from a pressure microphone?

I work with insects which are sensitive to particle velocity (pressure gradient) via their flagellum ears. I need to monitor the sound level of the playback stimuli they are exposed to, however, I ...
  • 3,910