{"id":239610,"date":"2024-10-19T15:40:32","date_gmt":"2024-10-19T15:40:32","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-iec-60565-22019\/"},"modified":"2024-10-25T10:23:01","modified_gmt":"2024-10-25T10:23:01","slug":"bs-en-iec-60565-22019","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-iec-60565-22019\/","title":{"rendered":"BS EN IEC 60565-2:2019"},"content":{"rendered":"

This part of IEC 60565 specifies the methods for low frequency pressure calibration of hydrophones<\/b> at frequencies from 0,01 Hz to several kilohertz depending on calibration method.<\/p>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
2<\/td>\nundefined <\/td>\n<\/tr>\n
5<\/td>\nAnnex ZA(normative)Normative references to international publicationswith their corresponding European publications <\/td>\n<\/tr>\n
8<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
11<\/td>\nFOREWORD <\/td>\n<\/tr>\n
13<\/td>\nINTRODUCTION <\/td>\n<\/tr>\n
14<\/td>\n1 Scope
2 Normative references
3 Terms and definitions <\/td>\n<\/tr>\n
18<\/td>\n4 Symbols <\/td>\n<\/tr>\n
19<\/td>\n5 Procedures for calibration
5.1 Principles <\/td>\n<\/tr>\n
20<\/td>\n5.2 Field limitations
5.3 Schematic survey of procedures
5.4 Reporting of results <\/td>\n<\/tr>\n
21<\/td>\n5.5 Recalibration periods
5.6 Temperature and pressure considerations for calibration
5.7 Preparation of transducers
6 Electrical measurements
6.1 Signal type
6.2 Earthing
6.3 Measurement of hydrophone output voltage
6.3.1 General
6.3.2 Electrical loading by measuring instrument <\/td>\n<\/tr>\n
22<\/td>\n6.3.3 Electrical loading by extension cable
6.3.4 Cross-talk and acoustic interference
6.3.5 Integral pre-amplifier
6.4 Measurement of projector current
7 Calibration by hydrostatic excitation
7.1 General
7.2 Principle
7.2.1 Determination of the alternating pressure <\/td>\n<\/tr>\n
23<\/td>\nFigures
Figure 1 \u2013 Diagram of calibration by hydrostatic excitation <\/td>\n<\/tr>\n
24<\/td>\n7.2.2 Determination of the correction factor
7.2.3 Determination of the equivalent height <\/td>\n<\/tr>\n
26<\/td>\n7.2.4 Calculation of the pressure sensitivity of hydrophone
7.3 Design of vibration system
7.4 Alternative method for hydrostatic excitation <\/td>\n<\/tr>\n
27<\/td>\n7.5 Uncertainty
8 Calibration by piezoelectric compensation
8.1 General
8.2 Principle
8.2.1 Determination of the sound pressure <\/td>\n<\/tr>\n
28<\/td>\n8.2.2 Determination of the characteristic constant
Figure 2 \u2013 Schematic drawing of calibration by piezoelectric compensation <\/td>\n<\/tr>\n
29<\/td>\n8.2.3 Calculation of the pressure sensitivity of hydrophone
8.3 Design of the calibration chamber
8.3.1 General
8.3.2 Low frequency chamber
8.3.3 High frequency chamber <\/td>\n<\/tr>\n
30<\/td>\n8.4 Practical limitations of the piezoelectric compensation method
8.5 Relative calibration method
Figure 3 \u2013 Diagram of the chamber for high frequency <\/td>\n<\/tr>\n
31<\/td>\n8.6 Uncertainty
9 Calibration by acoustic coupler reciprocity
9.1 General
9.2 Principle
9.2.1 Theory of acoustic coupler reciprocity <\/td>\n<\/tr>\n
32<\/td>\n9.2.2 Procedures for the reciprocity calibration
Figure 4 \u2013 Reciprocity coupler with three transducers: a projector P,a reciprocal transducer T, and a hydrophone H to be calibrated <\/td>\n<\/tr>\n
33<\/td>\n9.2.3 Calculation of transfer impedance
9.2.4 Determination of acoustic compliance
9.3 Limitation of acoustic coupler reciprocity
9.3.1 Frequency limit <\/td>\n<\/tr>\n
34<\/td>\n9.3.2 Hydrophone limit
9.4 Measurement
9.4.1 General
9.4.2 Evidence of interference effects
9.4.3 Reciprocity verification <\/td>\n<\/tr>\n
35<\/td>\n9.4.4 Linearity verification
9.5 Uncertainty
10 Calibration by pistonphone
10.1 General
10.2 Principle
10.2.1 Determination of the sound pressure <\/td>\n<\/tr>\n
36<\/td>\n10.2.2 Determination of the compliance of the medium
10.2.3 Calculation of the pressure sensitivity
10.3 Limitations <\/td>\n<\/tr>\n
37<\/td>\n10.4 Relative calibration
10.4.1 Comparison with a reference transducer
10.4.2 Comparison using air\u2013water pistonphone <\/td>\n<\/tr>\n
38<\/td>\n10.5 Uncertainty
11 Calibration by vibrating column
11.1 General
11.2 Principle
11.2.1 General
Figure 5 \u2013 Comparison calibration using pistonphone with calibrated hydrophone <\/td>\n<\/tr>\n
39<\/td>\n11.2.2 Expression for the pressure
Figure 6 \u2013 Diagram of calibration by vibrating column <\/td>\n<\/tr>\n
40<\/td>\n11.2.3 Determination of the sensitivity <\/td>\n<\/tr>\n
41<\/td>\n11.3 Conditions of measurement
11.3.1 Mechanical <\/td>\n<\/tr>\n
42<\/td>\n11.3.2 Acoustical
11.4 Relative calibration method <\/td>\n<\/tr>\n
43<\/td>\n11.5 Uncertainty
12 Calibration by static pressure transducer
12.1 General
Figure 7 \u2013 Diagram of calibration by vibrating column using comparison <\/td>\n<\/tr>\n
44<\/td>\n12.2 Principle
12.2.1 Theory of static pressure calibration
12.2.2 Determination of the sensitivity of static pressure transducer
Figure 8 \u2013Diagram of comparison calibration using static pressure transducer <\/td>\n<\/tr>\n
45<\/td>\n12.2.3 Calculation of the pressure sensitivity
12.3 Limitations
12.4 Uncertainty <\/td>\n<\/tr>\n
46<\/td>\nAnnex A (informative)Advanced acoustic coupler calibration methods
A.1 General <\/td>\n<\/tr>\n
47<\/td>\nA.2 Acoustic-coupler calibration using a reference coupler with two reciprocal transducers and an auxiliary coupler with the same two transducers and a hydrophone to be calibrated
A.2.1 General <\/td>\n<\/tr>\n
48<\/td>\nA.2.2 Theory
Figure A.1 \u2013 Reference coupler with two transducers: a projector P anda reciprocal transducer T
Figure A.2 \u2013 Auxiliary coupler with three transducers: a projector P,a reciprocal transducer T and a hydrophone H to be calibrated <\/td>\n<\/tr>\n
49<\/td>\nA.3 Acoustic-coupler calibration using a reference coupler with two reciprocal transducers and an auxiliary coupler with the same two transducers, a hydrophone to be calibrated, and a sound source
A.3.1 General <\/td>\n<\/tr>\n
50<\/td>\nA.3.2 Theory
Figure A.3 \u2013 Auxiliary coupler with four transducers: a projector P, a reciprocaltransducer T, a sound source S and a hydrophone H to be calibrated <\/td>\n<\/tr>\n
51<\/td>\nA.4 Acoustic-coupler calibration using a coupler, a reciprocal transducer, a projector, a hydrophone to be calibrated, and a subsidiary body of known compliance
A.4.1 General
A.4.2 Theory <\/td>\n<\/tr>\n
52<\/td>\nFigure A.4 \u2013 Schematic drawing of the measuring system <\/td>\n<\/tr>\n
54<\/td>\nAnnex B (informative)Assessment of uncertainty in the low frequencypressure calibration of hydrophone
B.1 General
B.2 Type A evaluation of uncertainty
B.3 Type B evaluation of uncertainty
B.4 Reported uncertainty <\/td>\n<\/tr>\n
55<\/td>\nB.5 Common sources of uncertainty <\/td>\n<\/tr>\n
57<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Underwater acoustics. Hydrophones. Calibration of hydrophones – Procedures for low frequency pressure calibration<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2019<\/td>\n58<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":239614,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[270,2641],"product_tag":[],"class_list":{"0":"post-239610","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-17-140-50","7":"product_cat-bsi","9":"first","10":"instock","11":"sold-individually","12":"shipping-taxable","13":"purchasable","14":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/239610","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/239614"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=239610"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=239610"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=239610"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}