The Speech Transmission Index (STI) is a rapid and objective measurement method developed to determine the extent of the decrease in intelligibility of speech after transmission through a communication channel.
The STI method emits a specific test signal through the transmission channel, analyzes the received signal, and derives the transmission quality of the communication channel, expressed as a value between 0 and 1.
Based on the STI value, it is possible to determine the potential intelligibility of speech through the transmission channel. The traditional STI measurement method requires professional hardware and software, and is obtained through standardized measurement methods by acoustic professionals. The technical threshold is relatively high, and real-time measurement cannot be achieved.
The blind testing technology of the Yousonic Speech Transmission Index (STI) has broken through the limitations of traditional measurement methods. It only requires a clear recording file (containing continuous speech from a single speaker) from the site to quickly obtain the STI value. In addition, the Yousonic STI blind testing technology can also provide real-time detection of the STI value.
Reverberation Time is a fundamental parameter in room acoustics. It represents the time it takes for the average sound energy density to decay to one-millionth of its original value after the sound source has been interrupted or stopped, indicating the time required for the sound to decay by 60dB after the sound source stops emitting sound. It is often denoted as T60.
Traditional reverberation time measurements, including the interrupted sound source method and the impulse response method, both require professional hardware and software, and are typically conducted by specialized acoustic professionals. Furthermore, these methods are generally limited to acoustically empty field environment rather than real-world full field conditions.
The Yousonic blind testing technology for T60 reverberation time only requires a clear recording file (containing continuous speech from a single speaker) from the room being tested, and can easily and quickly obtain the T60 values for 500Hz, 1000Hz, and 2000Hz, providing a detection range of 0.3-2.0 seconds.
Reverberation Time is a fundamental parameter in room acoustics. It represents the time it takes for the average sound energy density to decay to one-millionth of its original value after the sound source has been interrupted or stopped, indicating the time required for the sound to decay by 60dB after the sound source stops emitting sound. It is often denoted as T60.
Traditional reverberation time measurements, including the interrupted sound source method and the impulse response method, both require professional hardware and software, and are typically conducted by specialized acoustic professionals. Furthermore, these methods are generally limited to acoustically empty field environment rather than real-world full field conditions.
The Yousonic blind testing technology for T60 reverberation time requires only a clear recording of clapping hands in the room to be tested. With this recording, it can swiftly and accurately determine the reverberation times at 500Hz, 1000Hz, and 2000Hz frequencies. You can now experience this technology, covering a range from 0.3 to 2.0 seconds.
Predicting MOS scores based on deep learning methods. MOS (Mean Opinion Score) is a standard for evaluating voice quality, quantifying users' subjective feelings to assess the quality differences between the original voice and the sound after network transmission. MOS testing is used to research and quantify the behavior of users in answering and perceiving voice quality, with different survey users making subjective comparisons between the original standard voice and the degraded sound after wireless network transmission.
Testing
Sound Pressure Level (SPL) is a physical quantity used to describe sound intensity, representing the strength of sound pressure generated when sound waves propagate through air. SPL is measured in decibels (dB) and is defined as the logarithmic value of sound pressure relative to a reference sound pressure. The reference sound pressure is usually set at 20 micropascals, which is the minimum sound pressure perceivable by the human auditory system.
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