Deeplight | Acoustic Test Standards and Test Contents

Acoustic testing is a niche testing field with high subdivision and professionalism. It requires a lot of experience for engineers. Almost all electronic products will involve noise generated by themselves, automatic recognition of sounds, and sounds. Through the acoustic test, it can evaluate the acoustic quality of the product, improve the experience of the product, and intelligently create a high-end new product model.

The acoustic tests that Deeplight can perform include: mobile phone tablet voice call quality test, drone flight noise test, personal voice terminal test, vehicle voice terminal test, voice wake-up and voice recognition test, APP communication test, electro acoustic performance test, wireless Bluetooth Electroacoustic testing of smart terminals such as headphones, smart speakers, and smart homes.

It involves product noise testing, sound power testing, sound quality testing, etc.

Mobile phone voice test, standard voice test under GSMCDMAUMTSLTE, can simulate steady-state noise and non-steady-state noise in real life, can perform quiet field and noise field test, meet North America, EU, China, Japan and South Korea Network test requirements of operators in other regions.

Test parameters: send/receive voice quality test, echo loop test, sidetone test.

According to the standard:

•YD/T 1538 Technical requirements and test methods for audio performance of digital mobile terminals

•3GPP TS 26.131 3rd Generation Partnership Project，Technical Specification Group Services and System Aspects; Terminal acoustic characteristic for telephony; Requirements

•3GPP TS 26.132 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Speech and video telephony terminal acoustic test specification
•Vodafone Performance TST Audio Quality (NB/WB)
•TIA-810 Telecommunications; Telephone Terminal Equipment; Transmission Requirements for Narrowband Voice over IP and Voice over PCM Digital Wireline Telephones.
•TIA-920 Telecommunications;Telephone Terminal Equipment;Transmission Requirements for Wideband Digital Wireline Telephones

Carrying out the testing service required by "HD Voice Minimum Requirements" can be used as a proof of meeting the technical requirements of HD Voice and self-certification, and can sign an authorization contract with GSMA to obtain the right to use the HD Voice logo in the market.

Test parameters: voice communication quality test (echo, noise suppression, sending direction, receiving direction, dual channel )

According to the standard:

•ITU-T H.870 Guidelines for safe listening devices
•Skype for Business  Audio Test Specification
•3GPP TS 26.132 3rd Generation Partnership Project; Technical Specification Group Services and System Aspects; Speech and video telephony terminal acoustic test specification
•TIA-920 Telecommunications; Telephone Terminal Equipment; Transmission Requirements for Wideband Digital Wireline Telephones

Test content: UAV noise test, in a semi-anechoic space, multiple low-background and high-sensitivity microphones can simultaneously record noise signals at different coordinate points, and stereoscopically display the noise distribution of the UAV.

Test parameters: sound quality test, running noise, voice recognition and voice wake up.

•GB/T 36464.2-2018 Information Technology Intelligent Voice Interaction System Part 2: Smart Home

•GB/T 36464.3-2018 Information Technology Intelligent Voice Interaction System Part 3: Intelligent Customer Service

•GB/T 36464.4-2018 Information Technology Intelligent Voice Interaction System Part 4: Mobile Terminal

•GB/T 36464.5-2018 Information Technology Intelligent Voice Interaction System Part 5: Vehicle Terminal

Test parameters: headphone frequency response, distortion curve, impedance curve.

•GB/T 12060.4 Acoustic System Equipment Part 4 Microphone Measurement Method

•GB/T 25102.100 Electroacoustic Hearing Aids Part 0: Measurement of Electroacoustic Properties

•SJ/Z 9143.2 Hearing Aids Part 9 Characteristics of Hearing Aids with Bone Vibrator Output

•IEC 60268-4 Sound system equipment Part 4:  Microphones
•IEC 60118-0 Electroacoustics-Hearing aids -Part 0: Measurement of the performance characteristics of hearing aids.

Test parameters: headphone frequency response, distortion curve, impedance curve

•GB/T 12060.5 Acoustic System Equipment Part 5 Main Performance Test Methods of Loudspeakers

•GB/T 12060.3 Acoustic System Equipment Part 3 Measurement Methods of Audio Amplifiers

•GB 7313 High-fidelity speaker system minimum performance requirements and measurement methods

•SJ/T 11218 General Specification for Combined Speaker System for Home Theater

•GB/T 14277 General Specification for Audio Combination Equipment

•IEC 60268-5 Sound system equipment Part 5: Loudspeakers

Test parameters: educational tablet and computer Skype call test, laptop touchpad touch feedback test, screen and fan noise, sound pressure level test, sound power level test.

•GB/T 36464.2-2018 Information Technology Intelligent Voice Interaction System Part 2: Smart Home

•Skype for Business Audio Specification Conferencing Devices

• GB/T 18313 Measurement of Airborne Noise of Acoustic Information Technology Equipment and Communication Equipment

•ISO 7779 Acoustics --Measurement of airborne noise emitted by information technology and telecommunications equipment

Test the frequency response, distortion, signal-to-noise ratio, loudness, impedance characteristics and other electro-acoustic performance indicators of automotive electro-acoustic devices, etc., and extract, analyze and test acoustic signals for active noise reduction systems, buzzers, etc. Automotive NVH test, product noise test, communication acoustic test, speech recognition test, parts abnormal sound test, vibration test, sound quality test.

(2) Vehicle hands-free terminal, test parameters: single pass voice quality test, voice quality under background noise, echo and dual channel test;

electro acoustic performance test: vehicle speaker, microphone, audio amplifier, buzzer, etc; Acoustic performance test of automotive materials: sound absorption, sound insulation, sound transmission loss, etc.

•ITU–T P.1100 Narrow-band hands-free communication in motor vehicles
•ITU–T P.1110 

The vehicle emergency call test is based on the following standards:

            •ITU-T P.1140 Speech communication requirements for emergency calls originating from vehicles

•GOST 33468 Narrowband Test of Vehicle Emergency Call Device

•UG GOST 55531 Automotive Emergency Call System Broadband Test

Test parameters: noise test, sound pressure level test, sound power level test, sound quality test and noise source analysis. (power adapter, server, etc.)

•GB/T 18313 Measurement of airborne noise of acoustic information technology equipment and communication equipment

•ISO 7779 Acoustics --Measurement of airborne noise emitted by information technology and telecommunications equipment

•GB/T 3767 Acoustic Sound Pressure Method for Determination of Noise Source Sound Power and Sound Energy Level Engineering Method for Approximate Free Field Above the Reflecting Surface

•ISO 3744 Acoustics-Determination of sound power levels and sound energy levels of noise sources using sound pressure-Engineering methods for an essentially free field over a reflecting plane.

Uses: used for speech recognition testing and research and development, subjective evaluation of voice and sound quality, Dolby sound.

ETSI ES 202 396-1 Speech and multimedia Transmission Quality (STQ); Speech quality performance in the presence of background noise; Part 1: Background noise simulation technique and background noise database.
Alexa Acoustic Testing User Guide Close Talk

GB/T 14221 Technical requirements for radio program audition room

GB/T 9375 Radio and tape recorder listening test

The above is an introduction to the products and acoustic test standards involved in the acoustic test. The content is more detailed. Customers are welcome to consult Deeplight on the acoustic test certification. We will provide you with professional and accurate services for product acoustic testing.