大黄蜂还能当宠物养？她跟黄蜂吃饭睡觉晒太阳，居然有点酷
百度 HEAAC是一个音频编解码器，旨在增强音频文件的数据压缩。
Questions related to measuring a device's frequency-response and sensitivity.
25 questions
3
votes
3
answers
84
views
MANTA Recorder Gain File for SoundTrap ST400
I am currently using MANTA for recording I made with a SoundTrap ST400 STD, with the High Pass Filter Off and Gain High.
I am filling in the "recorder information" in the MANTA metadata app ...
- 61
4
votes
2
answers
131
views
How to Translate Power Metrics in Raven Pro to Received Levels
I added in-band power and average power measurements to my selection table in Raven. I also have the end to end calculation of my instruments. To calculate the received levels, is it just a matter of ...
- 161
3
votes
1
answer
70
views
Hydrophone calibration in a tank vs open water?
I’m looking to calibrate some hydrophones (specifically SoundTrap 300HFs, but perhaps this applies more broadly). I’m aiming to compare the SoundTrap hydrophone with a reference one, roughly following ...
- 67
3
votes
1
answer
77
views
How to adjust seewave spectro to account for hydrophone sensitivity?
I am using seewave's spectro() to generate a spectrogram from a hydrophone recording. My call is:
...
- 53
5
votes
0
answers
84
views
How to apply calibration infromation to Triton generated LTSAs
Is it possible to apply single end-to-end calibration values or a transfer function to LTSA plots generated in Triton? The User Guide says that transfer functions are not applied to LTSAs but that a ...
- 550
11
votes
2
answers
172
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 ...
- 3,695
6
votes
1
answer
74
views
Recommendations for deep sea hydrophone calibration - US West Coast
I would like recommendations of where to get 7 deep-sea hydrophones fully calibrated. Units are SonoValuts (purchased new from Develogic) and the hydrophones are Neptune D/60. Recorders were ...
- 61
7
votes
1
answer
132
views
Calibrate automatic recorders: advice for reliable / reproducible workflow?
I would like to get the ambient noise levels of a habitat that I have been monitoring for some time (monitoring birds, 0-16 kHz). For this, I want to calibrate my recorders and get their sensitivity ...
- 1,136
8
votes
2
answers
227
views
Best practice for measuring amplitude of biophony
It is often useful to quantitatively measure (or at least estimate) the amplitude of an acoustic event such as a bird song. The desired measurement could be, for instance, that a bird sang at 105 dB ...
- 551
7
votes
1
answer
91
views
How can you incorporate the hydrophone calibration in Avisoft?
I am stuck in being able to calibrate the avisoft. I have a soundtrap Hf300 and I'm not sure how to insert the data into the avisoft calibration. Any advice? Thanks
All the best
6
votes
1
answer
124
views
Low cost hydrophones for quantitative sound pressure measurements?
Has anyone experience with using low-cost hydrophones, for example the Acquarian Audio H2a, and use a calibration measurements, for example by comparing to a Brüel Kjaer 8106, to get quantitative ...
- 620
15
votes
3
answers
116
views
How to evaluate changing sensitivity of a recorder over time?
In discussions with colleagues I've learned that the sensitivity of a recorder can vary over the duration of a deployment.
I'm not sure why or how this happens, but how can you evaluate if it has ...
- 1,888
19
votes
2
answers
284
views
SoundTrap calibration at high frequencies
SoundTraps, like all high frequency recorders, are highly unlikely to have a flat frequency response. Although there is some calibration information at 250 Hz from the manufacturer this will not ...
user213
4
votes
1
answer
66
views
Implementing reciprocity calibrations inhouse?
Inspired by this question I began to wonder how implementable an inhouse reciprocity calibration would be. In reciprocal calibration, 2 or 3 mics are used as sound sources and as recovers to quantify ...
- 4,050
11
votes
1
answer
75
views
Can someone recommend hardware to generate ultrasound on underwater recording rig?
I would like to construct a simple system for automatic playback of ultrasound signals at low levels for calibration purposes on an underwater recording rig. Can anyone point to a suitable DAC (...
user18