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Acoustic hailing device

Known as: AHD, Acoustic Hailing Device - AHD 
An acoustic hailing device (AHD) is a specialized loudspeaker that emits high-power sound waves for communicating at a distance. AHDs vary in design… 
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Papers overview

Semantic Scholar uses AI to extract papers important to this topic.
2016
2016
КАЧЕСТВО ЖИЗНИ ЛИЦ С АРТЕРИАЛЬНОЙ ГИПЕРТЕНЗИЕЙ В РОССИИ – ЕСТЬ ЛИ СВЯЗЬ СО СТАТУСОМ ЛЕЧЕНИЯ (ПО ДАННЫМ ПОПУЛЯЦИОННОГО ИССЛЕДОВАНИЯ ЭССЕ-РФ)
Aim. To evaluate  LQ in AH patients,  to analyze the relation of LQ and  treatment status,  and to study associated with LQ… 
2015
2015
A COMPARISON OF CONFIRMATORY METHOD DEVELOPMENT AND VALIDATION OF ANTIBIOTIC: NITROFURAN METABOLITES (AMOZ, AOZ, AHD and SEM) IN FISH AND SHRIMP MATRIX AMONG SOME LC-MS/MS SYSTEMS (HPLC-QUATTRO MICRO…
Confirmatory methods for determination of banned antibiotic: nitrofuran metabolites (AMOZ, AOZ AHD and SEM) were developed in… 
2010
2010
The Prevalence and Use of Advance Health Directives (AHD’s) in Promoting Patient Autonomy at End-of Life
Effective and inclusive end-of-life planning can improve care of the dying patient; reduce patient anxiety about death, and aid… 
2009
2009
High Performance Non-Binary Quasi-Cyclic LDPC Codes on Euclidean Geometries LDPC Codes on Euclidean Geometries
This paper presents algebraic methods for constructing high performance and efficiently encodable non-binary quasi-cyclic LDPC… 
2007
2007
OFF-LINE HANDWRITTEN ARABIC CHARACTERS SEGMENTATION USING SLANT-TOLERANT SEGMENT FEATURES (STSF) by
The main theme of this research is the off-line handwritten Arabic characters segmentation. A successful handwritten Arabic… 
2005
2005
RAILWAY MEN AHD THEIER EXPOSURE TO ELF ELM FIELDS
In agreement with EU the law 480/2000 gives reference value for exposure of Professional and current population within the… 
2000
2000
Towards the unification of the Australian Height Datum between mainland and Tasmania using GPS and AUSGeoid98
The AUSGeoid98 geoid model is used in conjunction with nation-wide GPS networks and spiritlevelled Australian Height Datum (AHD… 
1998
1998
Possible Evidence for Distortions in The Australian Height Datum in Western Australia
The Western Australian STATEFIX GPS network, used in conjunction with the EGM96 global geopotential model, indicates the possible… 
1997
1997
A WGS84-AHD Profile over the Darling Fault: Western Australia
The Darling Fault near Perth in Western Australia causes a steep geoid gradient of approximately 100mm/km. Existing gravimetric… 
1965
1965
The life cycle of Bolbophorus confusus (Krause, 1914) Dubois, 1935 (Tremotoda: Strigeoidea) and the effects of the metacercariae on fish hosts