GB/T 25102.7-2017 PDF EnglishUS$260.00 · In stock · Download in 9 seconds
GB/T 25102.7-2017: Electroacoustics -- Hearing aids -- Part 7: Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes Delivery: 9 seconds. True-PDF full-copy in English & invoice will be downloaded + auto-delivered via email. See step-by-step procedure Status: Valid
Similar standardsGB/T 25102.7-2017: Electroacoustics -- Hearing aids -- Part 7: Measurement of the performance characteristics of hearing aids for production, supply and delivery quality assurance purposes---This is an excerpt. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.), auto-downloaded/delivered in 9 seconds, can be purchased online: https://www.ChineseStandard.net/PDF.aspx/GBT25102.7-2017 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 17.140.50 M 72 GB/T 25102.7-2017 / IEC 60118-7:2005 Electroacoustics – Hearing Aids – Part 7: Measurement of the Performance Characteristics of Hearing Aids for Production, Supply and Delivery Quality Assurance Purposes (IEC 60118-7:2005, IDT) ISSUED ON: SEPTEMBER 07, 2017 IMPLEMENTED ON: APRIL 01, 2018 Issued by: General Administration of Quality Supervision, Inspection and Quarantine; Standardization Administration of the People’s Republic of China. Table of ContentsForeword ... 3 1 Scope ... 5 2 Normative References ... 5 3 Terms and Definitions ... 6 4 General Conditions ... 8 5 Nominal Characteristics and Tolerances ... 9 6 Test Box and Test Equipment ... 9 7 Test Conditions ... 11 8 Measurements, Specifications and Tolerances ... 15 9 Maximum Permitted Expanded Uncertainty of Measurements ... 21 Bibliography ... 23ForewordGB/T 25102 Electroacoustics – Hearing Aids is composed of the following parts: --- Part 0: Measurement of Electroacoustic Characteristics; --- Part 1: Hearing Aids with Induction Pick-up Coil Input; --- Part 2: Hearing Aids with Automatic Gain Control Circuits; --- Part 3: Hearing Aids that are not Fully Worn by the Listener; --- Part 4: Induction Loop Systems for Hearing Aid Purposes – Magnetic Field Strength; --- Part 5: Nipple Connector for Insert Earphones; --- Part 6: Characteristics of Electrical Input Circuits for Hearing Aids; --- Part 7: Measurement of the Performance Characteristics of Hearing Aids for Production, Supply and Delivery Quality Assurance Purposes; --- Part 8: Methods of Measurement of Performance Characteristics of Hearing Aids under Simulated in Situ Working Conditions; --- Part 9: Methods of Measurement of Characteristics of Hearing Aids with Bone Vibrator Output; --- Part 11: Symbols and Markings for Hearing Aids and Related Equipment; --- Part 12: Dimensions of Electrical Connector Systems; --- Part 13: Electromagnetic Compatibility (EMC); --- Part 14: Specification of the Digital Interface; --- Part 15: Signal Processing in Hearing Aids. This Part is Part 7 of GB/T 25102. This Part was drafted as per the rules specified in GB/T 1.1-2009. This Part used translation method to equivalently adopt IEC 60118-7:2005 Electroacoustics – Hearing Aids – Part 7: Measurement of the Performance Characteristics of Hearing Aids for Production, Supply and Delivery Quality Assurance Purposes. This Part made the following editorial modification: --- Replace bandwidth with frequency range in 8.4.2 of this Part, which is more in line with Electroacoustics – Hearing Aids – Part 7: Measurement of the Performance Characteristics of Hearing Aids for Production, Supply and Delivery Quality Assurance Purposes1 ScopeThis Part of GB/T 25102 gives recommendations for the measurement of the performance characteristics of hearing aids of a particular model for production, supply and delivery quality assurance purposes. The manufacturer will normally assign nominal values. Only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this Part, it can be proved that is consistent with this Part. Table 4 gives extended values for Umax. This Part is applicable to the specific type of air-conduction hearing aids. This Part does not relate to mechanical or environmental tests. It should not be used as the basis for the exchange of information about hearing aid characteristics in general, nor is it intended to be used as a predictor for real-ear performance. NOTE: Terms such as "manufacturer" and "purchaser" are used in this Part. These terms may be understood, however, to refer to the supplier and recipient respectively in any arrangement for the supply of hearing aids in which the use of this Part is called for. Though the number of measurements covered by this Part is limited, it is not intended that all measurements described herein shall be made in every case. In case of custom-made in-the-ear instruments, the data supplied by the manufacturer applies only to the particular hearing aid being tested.2 Normative ReferencesThe following documents are essential to the application of this Document. For the dated documents, only the versions with the dates indicated are applicable to this Document; for the undated documents, only the latest version (including all the amendments) is applicable to this Document. IEC 60318-5 Electroacoustics – Simulators of Human Head and Ear – Part 5: 2cm3 Coupler for the Measurement of Hearing Aids and Earphones Coupled to the Ear by Means of Ear Inserts ......Source: Above contents are excerpted from the full-copy PDF -- translated/reviewed by: www.ChineseStandard.net / Wayne Zheng et al. Tips & Frequently Asked Questions:Question 1: How long will the true-PDF of English version of GB/T 25102.7-2017 be delivered?Answer: The full copy PDF of English version of GB/T 25102.7-2017 can be downloaded in 9 seconds, and it will also be emailed to you in 9 seconds (double mechanisms to ensure the delivery reliably), with PDF-invoice.Question 2: Can I share the purchased PDF of GB/T 25102.7-2017_English with my colleagues?Answer: Yes. The purchased PDF of GB/T 25102.7-2017_English will be deemed to be sold to your employer/organization who actually paid for it, including your colleagues and your employer's intranet.Question 3: Does the price include tax/VAT?Answer: Yes. Our tax invoice, downloaded/delivered in 9 seconds, includes all tax/VAT and complies with 100+ countries' tax regulations (tax exempted in 100+ countries) -- See Avoidance of Double Taxation Agreements (DTAs): List of DTAs signed between Singapore and 100+ countriesQuestion 4: Do you accept my currency other than USD?Answer: Yes. www.ChineseStandard.us -- GB/T 25102.7-2017 -- Click this link and select your country/currency to pay, the exact amount in your currency will be printed on the invoice. Full PDF will also be downloaded/emailed in 9 seconds.How to buy and download a true PDF of English version of GB/T 25102.7-2017?A step-by-step guide to download PDF of GB/T 25102.7-2017_EnglishStep 1: Visit website https://www.ChineseStandard.net (Pay in USD), or https://www.ChineseStandard.us (Pay in any currencies such as Euro, KRW, JPY, AUD).Step 2: Search keyword "GB/T 25102.7-2017". Step 3: Click "Add to Cart". If multiple PDFs are required, repeat steps 2 and 3 to add up to 12 PDFs to cart. Step 4: Select payment option (Via payment agents Stripe or PayPal). Step 5: Customize Tax Invoice -- Fill up your email etc. Step 6: Click "Checkout". Step 7: Make payment by credit card, PayPal, Google Pay etc. After the payment is completed and in 9 seconds, you will receive 2 emails attached with the purchased PDFs and PDF-invoice, respectively. Step 8: Optional -- Go to download PDF. Step 9: Optional -- Click Open/Download PDF to download PDFs and invoice. See screenshots for above steps: Steps 1~3 Steps 4~6 Step 7 Step 8 Step 9 |
