Speaker: Dr. Bruce Armstrong Ph.D. - Plasma Physics, 42+ years of experience designing underwater sound transducers, first as a defense scientist, later at a sonobuoy company designing vector hydrophones, and finally as the founde rof GeoSpectrum Technologies Inc.
This talk will cover the understanding of the physics of pressure hydrophones (Omni’s) and the relevance to practical use. Understanding the physics of pressure hydrophones (omni’s) can help you use them effectively. You may know that the tolerance on the sensitivity of a hydrophone is typically ±1dB. This is a reasonable number for higher frequencies, but at lower frequencies, you can calibrate your hydrophone/system to an accuracy of 0.03 dB or less with sewer pipe, equipment you already have, and $1,000.
Questions that will be addressed are:
- What is an acceleration-canceling hydrophone, how does it work, and do you need it?
- What determines the low frequency limit of a hydrophone and how do you improve upon it?
- What is the one thing you should never do in a vertical array?
- And, perhaps most importantly, why you should never mention rc in a conversation about hydrophones as it could be injurious to your professional reputation?
Please submit your questions during registration to help inform the conversation and inspire an interactive discussion.