Answers are grounded in this paper and cite their sources.
Measurements of bottom scattering strengths were made with a multi-frequency echo sounder mounted on a tower on a sandy bottom off West Destin, FL. Data were measured at five frequencies in the range 265–1850 kHz, at subcritical grazing angles ranging from 9° to 20° and at azimuths up to ±90° around the tower. Scattering strength increased at about f1.4 up to >400 kHz, peaked between 700 and 1100 kHz, and decreased at higher frequencies.
No takes yet. Share an insight, caveat, or question.
Greenlaw et al. (2004) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: