The seafloor is an important boundary of the ocean sound field, and the acoustic property of seafloor sediment and its spatial distribution are important factors that affect the propagation and variation of sound waves in the ocean. The research of seafloor sediment acoustic property（geoacoustic property） is an interdisciplinary subject involving marine geology, marine geophysics, and marine acoustics. The research of geoacoustic property mainly includes measurement techniques on geoacoustic property, the impacting factors on the geoacoustic property, the relationship between geoacoustic property and the physical-mechanical parameters（geoacoustic model), application of geoacoustic property and so on. The research of geoacoustics has important practical value and significance in many fields such as ocean sound field prediction, marine engineering construction, marine resources exploration, marine disaster prevention, etc. There are many institutes and scientists to do research on seafloor sediment acoustics.

At present, research on the acoustic property of seafloor sediments and geoacoustic models mainly focuses on high-frequency and single-parameter models, while research on broadband geoacoustic property from low-frequency to high-frequency and multi-parameter geoacoustic models are relatively lacking. With the development of new technology such as in-situ measurement at mid and low-frequencies, low-frequency geoacoustic inversion, and prediction methods based on artificial intelligence technologies such as machine learning and neural networks, research on broadband geoacoustic property from low to high-frequency and multi- parameter geoacoustic models have received more attention.

Therefore, the objective of research topics is to collect research papers on the new research progress on broadband seafloor sediment acoustic properties and multi-parameter geoacoustic model, including the new technology of measurement of sediment acoustic properties especially the mid and low-frequency measurement and inversion, the relationship between acoustic property and multiple physical-mechanical parameters(multi-parameter geoacoustic model), dispersion of sound speed and attenuation, impacting factors on the acoustic properties of sediments, new methods of sediment acoustic property prediction including AI technology such as machine learning, neural network and so on. The special issue calls for original and novel papers related to new progress of broadband geoacoustic property and multi-parameter geoacoustic models in any of the following research topics:

• The new technology of measurement of sediment acoustic property
• Relationship between acoustic property and multiple physical-mechanical parameters(Multi-parameter geoacoustic model)
• Dispersion of sound speed and attenuation
• Geoacoustic inversion
• Impacting factors on the acoustic properties of sediments
• New methods of sediment acoustic property prediction including AI technology such as machine learning, neural network

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Frontiers in Marine Science

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