John A Hildebrand
Biographic Data
| ID | 334573 |
|---|---|
| NAME | John A Hildebrand |
| GIVEN NAMES | John A |
| FAMILY NAME | Hildebrand |
| SIGNATURE | HILDEBRAND J A |
| AFFILIATIONS | Scripps Institution of Oceanography |
| ORCID | 0000-0002-5418-9799 |
| VERIFIED | Yes |
| TOTAL WORKS | 10 |
| TOTAL CITATIONS | 44 |
| WORKS AS AUTHOR | 10 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1978 |
| LATEST PUBLICATION YEAR | 2022 |
| H-INDEX | 3 |
Killer Whale (Orcinus orca) Pulsed Calls in the Eastern Canadian Arctic
Killer whales (Orcinus orca) produce a variety of acoustic signal types used for communication: clicks, whistles, and pulsed calls. Discrete pulsed calls are highly stereotyped, repetitive, and unique to individual pods found around the world. Discriminating amongst pod specific calls can help determine population structure in killer whales and is used to track pod movements around oceans. Killer whale presence in the Canadian Arctic has increase…
Modeling and monitoring submerged prehistoric sites during offshore sand dredging and implications for the study of Early Holocene Coastal Occupation of Southern California
Beach sand dredging projects off the coast of Southern California provide data for improved understanding of the stratigraphic setting for early Holocene sediments and the potential for offshore buried archaeological materials. Geophysical data, core sediments, and invertebrate fossils allow models to be developed for six borrow sites within drown river valleys off San Diego County. These site‐specific models were tested during dredging operation…
Monitoring the acoustic ecology of the shelf break of Georges Bank, Northwestern Atlantic Ocean
Within a soundscape, anthropogenic sound often dominates frequency ranges used by various species, leading to signal overlap and potential communication masking. The acoustic niche hypothesis predicts species will avoid competition by vocalizing at unique bandwidths. To evaluate the extent of anthropogenic overlap, it’s helpful to understand acoustic niches across time. This study aims to assess the co-occurrence of cetaceans and anthropogenic ac…
The resonant acoustic signatures of lithic debitage
Acoustic methods to search for submerged archaeological sites have shown that concentrations of knapped flint produce a visible acoustic response in chirp sonar profiles in a variety of geographical settings. Field tests and simulations have suggested that the submerged lithic signal is due to acoustic resonances of the flaked stone. We model and measure the resonant acoustic signatures of chert, obsidian, metavolcanic, and granitic lithic debita…
Ringed, Bearded, and Ribbon Seal Vocalizations North of Barrow, Alaska
The acoustic repertoires of ringed, bearded, and ribbon seals are described, along with their seasonal occurrence and relationship to sea ice concentration. Acoustic recordings were made between September and June over three years (2006 – 09) along the continental slope break in the Chukchi Sea, 120 km north-northwest of Barrow, Alaska. Vocalizations of ringed and bearded seals occurred in winter and during periods of 80% – 100% ice cover but wer…
Rapid seismic reflection imaging at the Clovis period Gault site in central Texas
Using a modified seismic reflection imaging system with rapid translation of receivers, stratigraphic profiles were collected at the Gault site in central Texas. For rapid data collection, spikeless geophone receivers were placed in sand‐filled bags at tight spacing, and these receivers were rapidly pulled along the ground surface between shots. Shots were produced by a small hammer strike to a vertical pipe at 20‐cm intervals. High quality ultra…
Comparison of seismic reflection and ground‐penetrating radar imaging at the controlled archaeological test site, Champaign, Illinois
Shallow seismic reflection and ground‐penetrating radar images were collected at a replicated burial mound in the Controlled Archaeological Test Site (CATS) in Champaign, Illinois. The CATS mound contains a pig burial within a wood‐lined crypt at a depth of 1.6–2.4 m. Seismic reflection data were collected from two different energy sources: a small (0.5 kg) hammer for an impulsive source, and a vibrator for a frequency swept source. Seismic data …
New Approaches to Ceramic Use and Discard
Ethnoarchaeological data from contemporary Wanka villages in the Mantaro Valley of the Peruvian Andes provide new perspectives on the use and discard of ceramic cooking vessels. We present a regional survey of ceramic vessel use and discard with household consumption as the focus of study. A mathematical model determines vessel uselife from the age distribution of in-use vessels. We examine the number of vessels per household, their volume, their…
The Two-Curvature Method for Reconstructing Ceramic Morphology
Prehistoric ceramic containers were tools used in culinary and ceremonial activity. The archaeological record preserves fragmentary remains of these ceramic tools, challenging the archaeologist to interpret their use and function from potsherds rather than from whole pots. We introduce the two-curvature method for reconstructing ceramic vessel shape and volume from assemblages of potsherds. Each point on a ceramic vessel or sherd has two dimensio…
Pathways Revisited
A quantitative model of discard is presented. It is directed toward resolving the difficulty in relating frequency of archaeologically observed material objects to occurrences of past behavior. Schiffer's (1976) Pathway Model is revised and expanded as the basis of this analysis. Mathematical expressions are developed relating frequency of cultural deposition to past behavior. The pathways of deposition considered are use-related discard, acciden…
New Approaches to Ceramic Use and Discard
Ethnoarchaeological data from contemporary Wanka villages in the Mantaro Valley of the Peruvian Andes provide new perspectives on the use and discard of ceramic cooking vessels. We present a regional survey of ceramic vessel use and discard with household consumption as the focus of study. A mathematical model determines vessel uselife from the age distribution of in-use vessels. We examine the number of vessels per household, their volume, their…
The Two-Curvature Method for Reconstructing Ceramic Morphology
Prehistoric ceramic containers were tools used in culinary and ceremonial activity. The archaeological record preserves fragmentary remains of these ceramic tools, challenging the archaeologist to interpret their use and function from potsherds rather than from whole pots. We introduce the two-curvature method for reconstructing ceramic vessel shape and volume from assemblages of potsherds. Each point on a ceramic vessel or sherd has two dimensio…
Pathways Revisited
A quantitative model of discard is presented. It is directed toward resolving the difficulty in relating frequency of archaeologically observed material objects to occurrences of past behavior. Schiffer's (1976) Pathway Model is revised and expanded as the basis of this analysis. Mathematical expressions are developed relating frequency of cultural deposition to past behavior. The pathways of deposition considered are use-related discard, acciden…
The resonant acoustic signatures of lithic debitage
Acoustic methods to search for submerged archaeological sites have shown that concentrations of knapped flint produce a visible acoustic response in chirp sonar profiles in a variety of geographical settings. Field tests and simulations have suggested that the submerged lithic signal is due to acoustic resonances of the flaked stone. We model and measure the resonant acoustic signatures of chert, obsidian, metavolcanic, and granitic lithic debita…
Modeling and monitoring submerged prehistoric sites during offshore sand dredging and implications for the study of Early Holocene Coastal Occupation of Southern California
Beach sand dredging projects off the coast of Southern California provide data for improved understanding of the stratigraphic setting for early Holocene sediments and the potential for offshore buried archaeological materials. Geophysical data, core sediments, and invertebrate fossils allow models to be developed for six borrow sites within drown river valleys off San Diego County. These site‐specific models were tested during dredging operation…
Rapid seismic reflection imaging at the Clovis period Gault site in central Texas
Using a modified seismic reflection imaging system with rapid translation of receivers, stratigraphic profiles were collected at the Gault site in central Texas. For rapid data collection, spikeless geophone receivers were placed in sand‐filled bags at tight spacing, and these receivers were rapidly pulled along the ground surface between shots. Shots were produced by a small hammer strike to a vertical pipe at 20‐cm intervals. High quality ultra…
Comparison of seismic reflection and ground‐penetrating radar imaging at the controlled archaeological test site, Champaign, Illinois
Shallow seismic reflection and ground‐penetrating radar images were collected at a replicated burial mound in the Controlled Archaeological Test Site (CATS) in Champaign, Illinois. The CATS mound contains a pig burial within a wood‐lined crypt at a depth of 1.6–2.4 m. Seismic reflection data were collected from two different energy sources: a small (0.5 kg) hammer for an impulsive source, and a vibrator for a frequency swept source. Seismic data …
Pathways Revisited
A quantitative model of discard is presented. It is directed toward resolving the difficulty in relating frequency of archaeologically observed material objects to occurrences of past behavior. Schiffer's (1976) Pathway Model is revised and expanded as the basis of this analysis. Mathematical expressions are developed relating frequency of cultural deposition to past behavior. The pathways of deposition considered are use-related discard, acciden…
The Two-Curvature Method for Reconstructing Ceramic Morphology
Prehistoric ceramic containers were tools used in culinary and ceremonial activity. The archaeological record preserves fragmentary remains of these ceramic tools, challenging the archaeologist to interpret their use and function from potsherds rather than from whole pots. We introduce the two-curvature method for reconstructing ceramic vessel shape and volume from assemblages of potsherds. Each point on a ceramic vessel or sherd has two dimensio…
New Approaches to Ceramic Use and Discard
Ethnoarchaeological data from contemporary Wanka villages in the Mantaro Valley of the Peruvian Andes provide new perspectives on the use and discard of ceramic cooking vessels. We present a regional survey of ceramic vessel use and discard with household consumption as the focus of study. A mathematical model determines vessel uselife from the age distribution of in-use vessels. We examine the number of vessels per household, their volume, their…
Comparison of seismic reflection and ground‐penetrating radar imaging at the controlled archaeological test site, Champaign, Illinois
Shallow seismic reflection and ground‐penetrating radar images were collected at a replicated burial mound in the Controlled Archaeological Test Site (CATS) in Champaign, Illinois. The CATS mound contains a pig burial within a wood‐lined crypt at a depth of 1.6–2.4 m. Seismic reflection data were collected from two different energy sources: a small (0.5 kg) hammer for an impulsive source, and a vibrator for a frequency swept source. Seismic data …
Rapid seismic reflection imaging at the Clovis period Gault site in central Texas
Using a modified seismic reflection imaging system with rapid translation of receivers, stratigraphic profiles were collected at the Gault site in central Texas. For rapid data collection, spikeless geophone receivers were placed in sand‐filled bags at tight spacing, and these receivers were rapidly pulled along the ground surface between shots. Shots were produced by a small hammer strike to a vertical pipe at 20‐cm intervals. High quality ultra…
Ringed, Bearded, and Ribbon Seal Vocalizations North of Barrow, Alaska
The acoustic repertoires of ringed, bearded, and ribbon seals are described, along with their seasonal occurrence and relationship to sea ice concentration. Acoustic recordings were made between September and June over three years (2006 – 09) along the continental slope break in the Chukchi Sea, 120 km north-northwest of Barrow, Alaska. Vocalizations of ringed and bearded seals occurred in winter and during periods of 80% – 100% ice cover but wer…
Monitoring the acoustic ecology of the shelf break of Georges Bank, Northwestern Atlantic Ocean
Within a soundscape, anthropogenic sound often dominates frequency ranges used by various species, leading to signal overlap and potential communication masking. The acoustic niche hypothesis predicts species will avoid competition by vocalizing at unique bandwidths. To evaluate the extent of anthropogenic overlap, it’s helpful to understand acoustic niches across time. This study aims to assess the co-occurrence of cetaceans and anthropogenic ac…
The resonant acoustic signatures of lithic debitage
Acoustic methods to search for submerged archaeological sites have shown that concentrations of knapped flint produce a visible acoustic response in chirp sonar profiles in a variety of geographical settings. Field tests and simulations have suggested that the submerged lithic signal is due to acoustic resonances of the flaked stone. We model and measure the resonant acoustic signatures of chert, obsidian, metavolcanic, and granitic lithic debita…
Killer Whale (Orcinus orca) Pulsed Calls in the Eastern Canadian Arctic
Killer whales (Orcinus orca) produce a variety of acoustic signal types used for communication: clicks, whistles, and pulsed calls. Discrete pulsed calls are highly stereotyped, repetitive, and unique to individual pods found around the world. Discriminating amongst pod specific calls can help determine population structure in killer whales and is used to track pod movements around oceans. Killer whale presence in the Canadian Arctic has increase…
Modeling and monitoring submerged prehistoric sites during offshore sand dredging and implications for the study of Early Holocene Coastal Occupation of Southern California
Beach sand dredging projects off the coast of Southern California provide data for improved understanding of the stratigraphic setting for early Holocene sediments and the potential for offshore buried archaeological materials. Geophysical data, core sediments, and invertebrate fossils allow models to be developed for six borrow sites within drown river valleys off San Diego County. These site‐specific models were tested during dredging operation…
Geology (9 works) · Archaeology (6 works) · Geography (5 works) · Archaeology and ancient environmental studies (4 works) · Fishery (4 works) · Geology (4 works) · Oceanography (4 works) · Paleontology (4 works) · Biology (3 works) · Marine animal studies overview (3 works)