GOST 34788-2021 PDF

Full title and description

GOST 34788-2021 — Motor vehicles. Call emergency services systems. Speakerphone quality. Technical requirements and test methods. The standard specifies technical requirements and both objective and subjective test methods to assess the quality of hands‑free (speakerphone) voice communications used by in‑vehicle emergency call systems (СВЭОС / eCall, ERA‑GLONASS configurations) when installed as original equipment in motor vehicles.

Abstract

This interstate GOST defines performance criteria, measurement setups, noise‑scenario recording procedures, microphone and loudspeaker placement, subjective assessment protocols and test reporting requirements for verifying two‑way duplex hands‑free voice links provided by vehicle emergency‑call systems. It is intended to ensure reliable voice communication between vehicle occupants and emergency‑response operators under realistic vehicle noise and operational conditions.

General information

• Status: Active / in force.
• Publication date: Introduced by Rosstandart order 22 November 2021; entry into force / publication date 1 June 2022 (effective date 2022‑06‑01).
• Publisher: Approved and published under Rosstandart (Federal Agency on Technical Regulating and Metrology) as a межгосударственный (interstate) standard.
• ICS / categories: Applications of information technology in transport — ICS 35.240 (IT applications in transport; vehicle telematics and emergency call systems).
• Edition / version: First edition — GOST 34788-2021.
• Number of pages: 20 pages (standard text).

Scope

The standard applies to motor vehicles of categories M and N equipped with an emergency call system in the configuration of factory‑fitted equipment. It covers requirements and test methods to verify establishment of a two‑way duplex voice connection via mobile radio networks, assessing intelligibility, noise immunity and subjective quality of the loudspeaker/microphone hands‑free path under defined vehicle operating and acoustic scenarios.

Key topics and requirements

• Definitions and general requirements for vehicle emergency‑call speakerphone (hands‑free) systems.
• Objective measurement methods: instrumentation, microphone placement, signal levels and standardized noise scenarios for repeatable acoustic recordings.
• Subjective assessment procedures: expert panels, test roles (near‑end and far‑end speakers), rating scales and test conditions (quiet and recorded noise scenarios).
• Duplex performance criteria referenced to existing voice‑quality limits (including references to related GOST requirements such as GOST 33464‑2015 where applicable).
• Test‑track and vehicle preparation rules: vehicle conditioning, tyre pressures, closed windows/roof, and specified road surface and environment for noise recordings.
• Reporting and documentation: required test protocol formats, appendices with example descriptions and drawings of system installation and cabin layouts.

Typical use and users

Primary users are vehicle manufacturers, OEM telematics and eCall system suppliers, independent testing and certification laboratories, type‑approval authorities and regulatory bodies responsible for vehicle safety/telematics compliance. The standard is used during design verification, type approval, production control and third‑party conformity testing of in‑vehicle emergency call speakerphone systems.

Related standards

Normative references cited in the standard include other GOST documents related to acoustic measurement practice and telematics quality (for example, GOST 33464‑2015 and measurement‑related standards referenced in the normative clauses). The document is part of the broader set of GOST vehicle standards introduced in 2021‑2022 addressing vehicle systems and testing methods.

Keywords

emergency call, eCall, ERA‑GLONASS, speakerphone, hands‑free, duplex voice, telematics, motor vehicles, acoustic testing, subjective assessment, GOST 34788‑2021.

FAQ

Q: What is this standard?

A: GOST 34788‑2021 is an interstate Russian standard specifying technical requirements and test methods for the speakerphone (hands‑free) voice path of vehicle emergency call systems.

Q: What does it cover?

A: It covers objective and subjective test procedures, measurement setups, noise‑scenario recording, microphone and loudspeaker positioning, duplex communication criteria and test reporting to confirm reliable two‑way voice communication between vehicle occupants and emergency operators.

Q: Who typically uses it?

A: Vehicle OEMs, telematics/eCall suppliers, test laboratories, certification bodies and regulators involved in vehicle type approval and conformity assessment use this standard.

Q: Is it current or superseded?

A: It is current (active). The standard was approved by Rosstandart on 22 November 2021 and came into force / was published with an effective date of 1 June 2022. There is no indication of supersession at the time of publication.

Q: Is it part of a series?

A: Yes — it belongs to the recent cluster of GOST vehicle standards issued in 2021 that address vehicle systems, testing and safety; it also cross‑references other GOST documents (for example, GOST 33464‑2015) relevant to voice quality and testing methods.

Q: What are the key keywords?

A: Emergency call, eCall, ERA‑GLONASS, speakerphone, hands‑free, duplex voice, telematics, acoustic testing, subjective evaluation.