{"id":230885,"date":"2024-10-19T15:01:41","date_gmt":"2024-10-19T15:01:41","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60118-02015\/"},"modified":"2024-10-25T09:18:31","modified_gmt":"2024-10-25T09:18:31","slug":"bs-en-60118-02015","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60118-02015\/","title":{"rendered":"BS EN 60118-0:2015"},"content":{"rendered":"

This part of IEC 60118<\/span> <\/span> gives recommendations for the measurement of the performance characteristics of air conduction hearing aids based on a free field technique and measured with an acoustic coupler.<\/p>\n

This part of IEC 60118<\/span> <\/span> is applicable to the measurement and evaluation of the electroacoustical characteristics of hearing aids, for example for type testing and manufacturer data sheets.<\/p>\n

The test results obtained by the methods specified in this part of IEC 60118<\/span> <\/span> will express the performance under conditions of the test and may deviate substantially from the performance of the hearing aid under actual conditions of use.<\/p>\n

This part of IEC 60118<\/span> <\/span> uses an acoustic coupler according to IEC 60318\u20115<\/span> <\/span> which is only intended for loading a hearing aid with a specified acoustic impedance and is not intended to model the sound pressure in a person\u2019s ear. The use of this acoustic coupler will yield different results from those obtained using the occluded ear simulator of IEC 60318\u20114<\/span> <\/span> as used in former editions of IEC 60118\u20110<\/span> <\/span>.<\/p>\n

For the measurement of the performance characteristics of hearing aids for simulated in situ<\/i> working conditions, IEC 60118\u20118<\/span> <\/span> can be used. For measurement of hearing aids under typical user settings and using a speech-like signal, IEC 60118\u201115<\/span> <\/span> can be used.<\/p>\n

For the measurement of the performance characteristics of hearing aids for production, supply and delivery quality-assurance purposes, IEC 60118\u20117<\/span> <\/span> can be used. The frequency range has been extended to 8 kHz in this part of IEC 60118<\/span> <\/span> as opposed to 5 kHz in IEC 60118\u20117<\/span> <\/span>.<\/p>\n

Though the number of measurements covered by this part of IEC 60118<\/span> <\/span> is limited, it is not intended that all measurements described herein are mandatory.<\/p>\n

In cases of custom-made in-the-ear instruments, the data supplied by the manufacturer applies only to the particular hearing aid being tested.<\/p>\n

PDF Catalog<\/h4>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
6<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
9<\/td>\nFOREWORD <\/td>\n<\/tr>\n
11<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
12<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
16<\/td>\n4 General conditions
4.1 Acoustic test method <\/td>\n<\/tr>\n
17<\/td>\n4.2 Acoustic coupler
4.3 Measurement frequency range
4.4 Reporting of data
5 Test enclosure and test equipment
5.1 General
5.2 Unwanted stimuli in the test enclosure
5.3 Sound source <\/td>\n<\/tr>\n
18<\/td>\n5.4 Measurement system for the measurement of the sound pressure level and harmonic distortion produced by a hearing aid
5.5 Direct-current measuring system <\/td>\n<\/tr>\n
19<\/td>\n5.6 Magnetic field source for ETLS and MASL measurements
6 Test conditions
6.1 General <\/td>\n<\/tr>\n
20<\/td>\n6.2 Control of the sound field
Figures
Figure 1 \u2013 Example of test arrangement for behind-the-ear hearing aid <\/td>\n<\/tr>\n
21<\/td>\n6.3 Measurement configuration for directional hearing aids
Figure 2 \u2013 Example of test arrangement for in-the-ear hearing aid <\/td>\n<\/tr>\n
22<\/td>\n6.4 Normal operating conditions for a hearing aid
6.4.1 General
6.4.2 Battery or supply voltage
Figure 3 \u2013 Example of test arrangement for directional hearing aid <\/td>\n<\/tr>\n
23<\/td>\n6.4.3 Settings of controls
6.4.4 Ambient conditions
6.4.5 Sound outlet system
Tables
Table 1 \u2013 Resistors and open circuit voltages for zinc-air battery simulators <\/td>\n<\/tr>\n
24<\/td>\n6.4.6 Accessories
7 Test procedures
7.1 Frequency response curves
7.2 OSPL90 frequency response curve <\/td>\n<\/tr>\n
25<\/td>\n7.3 Full-on gain response curve
7.4 Basic frequency response curve
7.4.1 Test procedure
Figure 4 \u2013 Example of OSPL90 curve and basic frequency response curve <\/td>\n<\/tr>\n
26<\/td>\n7.4.2 Frequency range
Figure 5 \u2013 Example of determination of frequency rangefrom basic frequency response curve <\/td>\n<\/tr>\n
27<\/td>\n7.4.3 Reference test gain (RTG)
7.5 Total harmonic distortion
7.6 Equivalent input noise
7.7 Battery current
Table 2 \u2013 Distortion test frequencies and input sound pressure levels <\/td>\n<\/tr>\n
28<\/td>\n7.8 Measurements for hearing aids having induction pick-up coil
7.8.1 General
7.8.2 Equivalent test loop sensitivity (ETLS)
7.8.3 Maximum HFA magneto-acoustical sensitivity level (HFA MASL) of induction pick-up coil
8 Characteristics of electrical input circuits for hearing aids
8.1 Electrical characteristics
8.1.1 General <\/td>\n<\/tr>\n
29<\/td>\n8.1.2 Input impedance
8.1.3 Input sensitivity
8.2 Mechanical characteristics and electrical function of connector system for electrical input
9 Additional optional test procedures
9.1 General
9.2 Effects of tone control and gain control
9.2.1 Basic frequency response: effect of tone control
9.2.2 Frequency response: effect of gain control position <\/td>\n<\/tr>\n
30<\/td>\n9.2.3 Characteristics of the gain control
9.3 Intermodulation distortion
9.4 Effects of variation of battery or supply voltage and internal resistance
9.4.1 Full-on gain <\/td>\n<\/tr>\n
31<\/td>\n9.4.2 OSPL90
9.4.3 Total harmonic distortion
9.4.4 Total intermodulation distortion
9.5 Equivalent input noise in one-third-octave bands <\/td>\n<\/tr>\n
32<\/td>\nFigure 6 \u2013 Example of hearing aid acoustic gain <\/td>\n<\/tr>\n
33<\/td>\nFigure 7 \u2013 Example of hearing aid output noise and test equipment noise
Figure 8 \u2013 Hearing aid equivalent input noise and ambient noise <\/td>\n<\/tr>\n
34<\/td>\n9.6 Additional measurements for hearing aids having induction pick-up coil
9.6.1 General
9.6.2 Basic frequency response
9.6.3 Frequency response with full-on gain control setting
9.6.4 Effect of gain control position on frequency response <\/td>\n<\/tr>\n
35<\/td>\n9.6.5 Harmonic distortion
9.7 Additional measurements for hearing aids having induction pick-up coil for use with a telephone
9.7.1 General
Figure 9 \u2013 Telephone magnetic field simulator (TMFS) <\/td>\n<\/tr>\n
36<\/td>\n9.7.2 SPLITS response curve
9.7.3 HFA-SPLITS
9.7.4 Relative simulated equivalent telephone sensitivity (RSETS)
Figure 10 \u2013 Example of hearing aids on TMFS for SPLITS test <\/td>\n<\/tr>\n
37<\/td>\n9.8 Additional measurements applying to AGC hearing aids
9.8.1 General
9.8.2 Steady-state input-output characteristics
Figure 11 \u2013 Example of a steady-state input-output characteristic <\/td>\n<\/tr>\n
38<\/td>\n9.8.3 Dynamic AGC characteristics (attack and release time)
9.9 Additional optional measurements with ear simulator, according to IEC 60318-4
9.9.1 General
9.9.2 Output sound pressure level frequency response curve for an input sound pressure level of 90 dB
9.9.3 Full-on gain response curve
9.9.4 Basic frequency response curve
9.9.5 Presentation of data
10 Maximum permitted expanded uncertainty of measurements <\/td>\n<\/tr>\n
39<\/td>\nTable 3 \u2013 Values of Umax for basic measurements <\/td>\n<\/tr>\n
40<\/td>\nBibliography <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Electroacoustics. Hearing aids – Measurement of the performance characteristics of hearing aids<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2015<\/td>\n42<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":230887,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[270,2641],"product_tag":[],"class_list":{"0":"post-230885","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\/230885","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\/230887"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=230885"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=230885"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=230885"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}