The First Large-scale Automotive ITU-T In-vehicle Voice Call Quality Laboratory_Zhongle Certification : Smart & Safety Driving /Mobile Internet Certification Expert

The First Large-scale Automotive ITU-T In-vehicle Voice Call Quality Laboratory

Release Time：2024-04-22 14:31Views：

China's automobile industry is booming, especially the surging of new energy vehicles. Under the trend of strong domestic and overseas demand, in addition to compact cars such as passenger cars, medium-sized cars such as MPV, minibuses, small logistics vehicles, and large cars such as heavy trucks and dump trucks have also joined the ranks of mobile phone interconnection and intelligent driving technology. Previously, Zhongle received a number of heavy truck CarPlay demand. Because many drivers of such cars are in long-distance driving application scenarios, the driving requirements of excellent performance and high safety factor are particularly important.

At present, the automotive industry knows that one of the most important modules of C P is the technical debugging and testing of ITU-T& VOICE CALL, which relies on the laboratory test environment of the vehicle (such as noise, etc.), and China has also built many small passenger car on-board voice laboratories in just a few years, and the field is full. However, for the vehicle voice test needs of large vehicles such as heavy trucks, various laboratories are discouraged, because the size and scale of the laboratory are far from meeting the size requirements of large vehicles.

If a worker wants to do a good job, he must first sharpen his tools. After rigorous technical and market analysis, Zhongle Certification confirms that it can build a professional, independent and compliant on-board voice call quality laboratory for large automobiles. After efforts, the first large automobile ITU-T vehicle voice call quality laboratory certified by Zhongle was completed on April 12, 2024, and officially put into use on April 22, 2024. Next, the status of the laboratory is shared by the industry:

1.Laboratory Appearance Drawing

2. Basic Acoustic Technical Parameters of the Laboratory

In 125Hz ~ 8kHz, reverberation time is less than 0.3s;
Laboratory background noise: when the normal external noise outside is less than 60 dB, the floor noise is controlled within 28 dBA;
Laboratory spectrum curve:

Note: During the construction of the laboratory, multi-layer sound-absorbing materials were filled with three walls, the wall between the test room and the equipment control room was thickened and soundproof materials were filled, and the door body was sound-absorbing doors, which met the parameter requirements of the semi-anechoic room.

3. Laboratory schedule: At present, the ITU-T&Voice Call of a large domestic heavy truck has been tested in the laboratory.