Recent estimates of costs for hydrophones, cable, and other hardware

• Google Sheet for sharing hydrophone hardware costs (estimates and actual costs with tax/shipping/etc; also known as "THE MATRIX")

Calibration curves for Orcasound hydrophones

CRT = Cetacean Research Technology

• CRT 40P (2025):

• SQ26-08 response curve:

• CRT-hydrophone-specs.pdf (CR1-3; C57; C305; C75; specs, not calibration curves)

Aquarian

• A5
• Val's response curve (for model 9, i.e. A5M9?):

HTI-99-HF

HTI-Cal_Memo_4167.PDF

LabCore40

Reson TC4032

ResonTC4032specs.pdf

Interocean Systems 902

Amplification / circuitry

CRT SQ26-08

Digital ~2020 image of hard copy sheet from Joe that came with the SQ26-08