使用随机射线跟踪来模拟简单房间的冲动响应。

模拟“鞋盒”（立方）空房间的冲动响应。

In this example, you measure engine noise and use psychoacoustic metrics to model its perceived loudness, sharpness, fluctuation strength, roughness, and overall annoyance level. You then simulate the addition of soundproofing material and recompute the overall annoyance level. Finally, you compare annoyance levels and show the perceptual improvements gained from applying soundproofing.

Design octave-band and fractional octave-band filters, including filter banks and octave SPL meters. Octave-band and fractional-octave-band filters are commonly used in acoustics. For example, octave filters are used to perform spectral analysis for noise control. Acousticians work with octave or fractional (often 1/3) octave filter banks because it provides a meaningful measure of the noise power in different frequency bands.

Obtain A-weighting and C-weighting filters the weightingFilter System object in the Audio Toolbox™.

演示如何测量八度频带的声压水平。在显示测量时，用户界面（UI）使您可以尝试各种参数。

使用SpeedGoat®Simulink®实时™目标设计实时活动噪声控制系统。万博1manbetx

此示例显示了如何使用MATLAB®高阶Ambisonic（HOA）演示功能创建Ambisonic插件。Ambisonics是一种空间音频技术，它代表使用球形谐波的三维声场。此示例包含一个编码器插件，一个用于生成自定义编码器插件的函数，解码器插件和一个可生成自定义解码器插件的函数。插件生成的自定义使用户可以为给定的Ambisonic配置指定各种Ambisonic订单和各种设备列表。

使用虚拟扬声器将Ambisonic音频解码为双耳音频。虚拟扬声器是位于球体表面的声源，听众位于球体的中心。每个虚拟扬声器都有一对与头部相关的传递功能（HRTF）：一个用于左耳，一根用于右耳。虚拟扬声器位置以及Ambisonic Order用于计算Ambisonic解码器矩阵。解码器的输出被与虚拟扬声器位置相对应的HRTF过滤。左HRTF的信号汇总在一起并喂给左耳。右HRTF的信号汇总在一起并向右喂食。此处显示了音频信号流的框图。

Use tools from Audio Toolbox™ to measure loudness, loudness range, and true-peak value. It also shows how to normalize audio to meet the EBU R 128 standard compliance.

说明了麦克风阵列横梁成形，以在干扰主导的嘈杂环境中提取所需的语音信号。此类操作可用于增强语音信号质量以进行感知或进一步处理。例如，嘈杂的环境可以是一个交易室，麦克风阵列可以安装在交易计算机的监视器上。如果交易计算机必须接受交易者的语音命令，则波束形式操作对于增强接收的语音质量并实现设计的语音识别精度至关重要。

Beamform signals received by an array of microphones to extract a desired speech signal in a noisy environment. It uses the dataflow domain in Simulink® to partition the data-driven portions of the system into multiple threads and thereby improving the performance of the simulation by executing it on your desktop's multiple cores.

Acquire and process live multichannel audio. It also presents a simple algorithm for estimating the Direction Of Arrival (DOA) of a sound source using multiple microphone pairs within a linear array.

Several basic aspects of audio signal positioning. The listener occupies a location in the center of a circle, and the position of the sound source is varied so that it remains within the circle. In this example, the sound source is a monaural recording of a helicopter. The sound field is represented by five discrete speaker locations on the circumference of the circle and a low-frequency output that is presumed to be in the center of the circle.

Track head orientation by fusing data received from an IMU, and then control the direction of arrival of a sound source by applying head-related transfer functions (HRTF).

使用矩阵编码从多通道音频信号生成立体声信号，以及如何使用矩阵解码从立体声混合物中恢复原始通道。此示例说明了Matlab®和Simulink®实现。万博1manbetx此示例还显示了如何使用数据流执行域可以改善性能。

脉冲响应（IR）是表征或代表线性时间不变（LTI）系统的重要工具。ImmpulserSponsemeaserer使您能够测量和捕获音频系统的冲动响应，包括：

测量音频输入和输出设备的总谐波失真和噪声水平。

Apply adaptive filters to acoustic echo cancellation (AEC).