{"id":15859,"date":"2025-11-27T03:12:17","date_gmt":"2025-11-27T03:12:17","guid":{"rendered":"https:\/\/sistc.com\/?p=15859"},"modified":"2026-06-16T09:29:49","modified_gmt":"2026-06-16T09:29:49","slug":"explore-mems-i2s-microphone-module-developer-edition","status":"publish","type":"post","link":"https:\/\/sistc.com\/zh\/explore-mems-i2s-microphone-module-developer-edition\/","title":{"rendered":"SISTC \u7535\u5b50\u79ef\u6728\uff1aMEMS I2S \u9ea6\u514b\u98ce\u6a21\u5757\uff08\u5f00\u53d1\u4eba\u5458\u7248\uff09"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">As voice interaction, acoustic analysis, and AI-enabled applications continue to grow, high-performance and easy-to-use microphone modules have become essential tools for developers, educators, and makers.<br>The<mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\"> <\/mark><strong><a href=\"https:\/\/sistc.com\/product-category\/mems-microphone\/\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">SISTC Electronic Building Block MEMS Microphone Module (Developer Edition)<\/mark><\/a><\/strong> is built around the high-performance <strong><a href=\"https:\/\/sistc.com\/wp-content\/uploads\/2024\/12\/WBC2718DT26TJ0-Datasheet_V1.1.pdf\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">WBC2718DT26TJ0-6\/TR<\/mark><\/a> MEMS digital sound sensor<\/strong> and provides I2S digital audio output. It works seamlessly with popular platforms such as Arduino, ESP32, and other AIoT controllers.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>1. Product Overview<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This MEMS I2S digital microphone module captures subtle sound pressure variations and converts them into stable electrical signals. The module internally transforms the analog input into a <strong>0\u20135V voltage range<\/strong>, followed by A\/D processing and digital transmission via the I2S protocol.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thanks to its compact size, high sensitivity, and low noise characteristics, the module is ideal for applications such as:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Speech recognition (ASR)<\/li>\n\n\n\n<li>Far-field audio capture<\/li>\n\n\n\n<li>Environmental recording and acoustic analysis<\/li>\n\n\n\n<li>AI audio classification \/ machine learning<\/li>\n\n\n\n<li>Arduino &amp; ESP32 educational \/ maker projects<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Combined with the powerful processing capability of ESP32, developers can easily implement voice recognition, real-time audio visualization, AI training, and more.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" width=\"807\" height=\"428\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1.png\" alt=\"\" class=\"wp-image-15860\" style=\"width:427px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1.png 807w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1-300x159.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1-768x407.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1-18x10.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/SISTC-Electronic-Building-Blocks-Product-display-image-1-600x318.png 600w\" sizes=\"(max-width: 807px) 100vw, 807px\" \/><figcaption class=\"wp-element-caption\">SISTC Electronic Building Blocks Product display image<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>2. Specifications<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Parameter<\/th><th>Value<\/th><\/tr><\/thead><tbody><tr><td>Operating Voltage<\/td><td>3.3\u20135V<\/td><\/tr><tr><td>Microphone Type<\/td><td>MEMS<\/td><\/tr><tr><td>Directivity<\/td><td>Omnidirectional (Top Port)<\/td><\/tr><tr><td>Output Interface<\/td><td>I2S<\/td><\/tr><tr><td>Sensitivity<\/td><td>-26 dB<\/td><\/tr><tr><td>Maximum SPL<\/td><td>124 dB<\/td><\/tr><tr><td>Signal-to-Noise Ratio<\/td><td>61 dB<\/td><\/tr><tr><td>Dimensions<\/td><td>48 \u00d7 24 mm<\/td><\/tr><tr><td>Weight<\/td><td>5.1 g<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These specifications ensure that the module performs reliably in low-noise environments while supporting high sound-pressure applications.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"733\" height=\"444\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Connection-graph.png\" alt=\"\" class=\"wp-image-15861\" style=\"width:433px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Connection-graph.png 733w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Connection-graph-300x182.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Connection-graph-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Connection-graph-600x363.png 600w\" sizes=\"(max-width: 733px) 100vw, 733px\" \/><figcaption class=\"wp-element-caption\">Connection graph<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>3. Schematic Overview<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The module consists of a MEMS microphone core, front-end signal conditioning, and an I2S digital audio interface.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Main functional blocks include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>MEMS sound sensor<\/li>\n\n\n\n<li>I2S digital interface<\/li>\n\n\n\n<li>Power regulation<\/li>\n\n\n\n<li>Signal conditioning circuitry<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>4. Connection Guide<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The module supports Arduino, ESP32, STM32, and similar controllers.<br>I2S pin definitions:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>SCK \/ BCLK<\/strong> \u2013 Bit clock<\/li>\n\n\n\n<li><strong>WS \/ LRCLK<\/strong> \u2013 Left\/Right clock<\/li>\n\n\n\n<li><strong>SD<\/strong> \u2013 Data output<\/li>\n\n\n\n<li><strong>VCC<\/strong> \u2013 3.3\u20135V<\/li>\n\n\n\n<li><strong>GND<\/strong><\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">ESP32 users can immediately record audio and visualize waveforms with simple example code.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><img decoding=\"async\" width=\"728\" height=\"378\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Product-schematic-diagram.png\" alt=\"\" class=\"wp-image-15862\" style=\"width:582px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Product-schematic-diagram.png 728w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Product-schematic-diagram-300x156.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Product-schematic-diagram-18x9.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/Product-schematic-diagram-600x312.png 600w\" sizes=\"(max-width: 728px) 100vw, 728px\" \/><figcaption class=\"wp-element-caption\">Product schematic diagram<\/figcaption><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>5. Development Environment Setup (Arduino IDE)<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Download Arduino IDE<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Visit the official Arduino software page:<br><a href=\"https:\/\/www.arduino.cc\/en\/software\/#ide\" target=\"_blank\" rel=\"noopener\">https:\/\/www.arduino.cc\/en\/software\/#ide<\/a><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Windows users can choose between:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Installer version<\/li>\n\n\n\n<li>ZIP package (no installation required, just extract and run)<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1000\" height=\"629\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image.png\" alt=\"\" class=\"wp-image-15863\" style=\"width:657px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image.png 1000w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-300x189.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-768x483.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-600x377.png 600w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Here, we will take the Windows system as an example to introduce the steps for downloading and installing. There are also two versions for the Windows system: one is the installation version, and the other is the download version which does not require installation. You can simply download the file to your computer, unzip it, and then use it.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"820\" height=\"745\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1.png\" alt=\"\" class=\"wp-image-15864\" style=\"width:628px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1.png 820w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1-300x273.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1-768x698.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1-13x12.png 13w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-1-600x545.png 600w\" sizes=\"(max-width: 820px) 100vw, 820px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">In general, we can download by clicking JUST DOWNLOAD.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Environment setup<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">First, open the Arduino IDE. Go to File \u2192 Preferences \u2192 Settings \u2192 Language; change it to Simplified Chinese, then click &#8220;OK&#8221; \u2013 the language will switch automatically. (English is also an option; we\u2019ll use Chinese as an example here.)<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"362\" height=\"385\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-2.png\" alt=\"\" class=\"wp-image-15865\" style=\"width:301px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-2.png 362w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-2-282x300.png 282w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-2-11x12.png 11w\" sizes=\"(max-width: 362px) 100vw, 362px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"876\" height=\"616\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3.png\" alt=\"\" class=\"wp-image-15866\" style=\"width:569px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3.png 876w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3-300x211.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3-768x540.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-3-600x422.png 600w\" sizes=\"(max-width: 876px) 100vw, 876px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Install the corresponding development board platform<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"394\" height=\"825\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-4.png\" alt=\"\" class=\"wp-image-15867\" style=\"width:308px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-4.png 394w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-4-143x300.png 143w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-4-6x12.png 6w\" sizes=\"(max-width: 394px) 100vw, 394px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Click to select the development board, choose the corresponding port number, and select the corresponding development board platform.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"587\" height=\"439\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-5.png\" alt=\"\" class=\"wp-image-15868\" style=\"width:436px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-5.png 587w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-5-300x224.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-5-16x12.png 16w\" sizes=\"(max-width: 587px) 100vw, 587px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"615\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-1024x615.png\" alt=\"\" class=\"wp-image-15869\" style=\"width:794px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-1024x615.png 1024w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-300x180.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-768x461.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6-600x360.png 600w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-6.png 1132w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Click on &#8220;File&#8221; in the menu to find &#8220;Preferences&#8221;, click to enter, then in &#8220;Additional Board Manager URLs&#8221;, enter &#8220;<a href=\"https:\/\/espressif.github.io\/arduino-esp32\/package_esp32_index.json\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0);color:#cf2e2e\" class=\"has-inline-color\">https:\/\/espressif.github.io\/arduino-esp32\/package_esp32_index.json<\/mark><\/a>&#8221; and click &#8220;OK&#8221;.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"834\" height=\"465\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7.png\" alt=\"\" class=\"wp-image-15870\" style=\"width:712px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7.png 834w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7-300x167.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7-768x428.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7-18x10.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-7-600x335.png 600w\" sizes=\"(max-width: 834px) 100vw, 834px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"929\" height=\"605\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9.png\" alt=\"\" class=\"wp-image-15872\" style=\"width:618px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9.png 929w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9-300x195.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9-768x500.png 768w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-9-600x391.png 600w\" sizes=\"(max-width: 929px) 100vw, 929px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">To install the driver library required for the module, enter &#8220;ESP32-audioI2S-master&#8221; in the library management box and install the corresponding library file.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"433\" height=\"517\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-8.png\" alt=\"\" class=\"wp-image-15871\" style=\"width:363px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-8.png 433w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-8-251x300.png 251w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-8-10x12.png 10w\" sizes=\"(max-width: 433px) 100vw, 433px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Then copy the following code into the editor and upload it to the ESP32 main board via ArduinoIDE.<\/p>\n\n\n\n<pre id=\"codecell0\" class=\"wp-block-preformatted\">#include \"driver\/i2s.h\"<br>#define SAMPLE_RATE (44100)<br><br>#define I2S_MIC_WS 12<br>#define I2S_MIC_DIN 13<br>#define I2S_MIC_BCK 14<br>#define I2S_PORT I2S_NUM_0<br>#define bufferLen 64<br><br>int16_t sBuffer[bufferLen];<br><br>  \/\/ \u5b89\u88c5I2S\u9a71\u52a8<br>  void i2s_install(){<br><br>    \/\/ \u914d\u7f6eI2S\u63a5\u6536<br>    i2s_config_t i2s_config = {<br>      .mode = (i2s_mode_t)(I2S_MODE_MASTER | I2S_MODE_RX),<br>      .sample_rate = SAMPLE_RATE,<br>      .bits_per_sample = I2S_BITS_PER_SAMPLE_16BIT,  <br>      .channel_format = I2S_CHANNEL_FMT_ONLY_LEFT,<br>      .communication_format = (i2s_comm_format_t)(I2S_COMM_FORMAT_I2S | I2S_COMM_FORMAT_I2S_MSB),<br>      .intr_alloc_flags = 0,<br>      .dma_buf_count = 16,<br>      .dma_buf_len = bufferLen,<br>      .use_apll = false      <br>   };<br>   if (ESP_OK != i2s_driver_install(I2S_PORT, &amp;i2s_config, 0, NULL)) {<br>      Serial.println(\"Install I2S driver failed\");<br>      return;<br>     }  <br>}<br><br>  \/\/ \u914d\u7f6eI2S\u5f15\u811a<br>  void i2s_setpin(){<br><br>    i2s_pin_config_t pin_config = {};<br>    pin_config.bck_io_num = I2S_MIC_BCK;<br>    pin_config.ws_io_num = I2S_MIC_WS;<br>    pin_config.data_out_num = I2S_PIN_NO_CHANGE;<br>    pin_config.data_in_num = I2S_MIC_DIN;<br><br>   if (ESP_OK != i2s_set_pin(I2S_PORT, &amp;pin_config)) {<br>    Serial.println(\"I2S set pin failed\");<br>    return;<br>  }<br> }<br><br>void setup() {<br><br>  Serial.begin(115200);<br>  Serial.println(\"Setup I2S ...\");<br><br>  delay(1000);<br>  i2s_install();<br>  i2s_setpin();<br>  i2s_start(I2S_PORT);<br>  delay(500);  <br>}<br><br><br>void loop() {<br>   size_t bytesIn = 0;<br>  esp_err_t result = i2s_read(I2S_PORT, &amp;sBuffer, bufferLen, &amp;bytesIn, portMAX_DELAY);<br>  if (result == ESP_OK)<br>  {<br>    int samples_read = bytesIn \/ 2;<br>    if (samples_read > 0) {<br>      float mean = 0;<br>      for (int i = 0; i &lt; samples_read; ++i) {<br>        mean += (sBuffer[i]);<br>      }<br>      mean \/= samples_read;<br>      Serial.println(mean);<br>      delay(50);<br>    }<br>  }<br><br>}<\/pre>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"719\" height=\"438\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-10.png\" alt=\"\" class=\"wp-image-15873\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-10.png 719w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-10-300x183.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-10-18x12.png 18w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-10-600x366.png 600w\" sizes=\"(max-width: 719px) 100vw, 719px\" \/><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>6. Test Results<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">After connecting the MEMS I2S microphone to ESP32 and running the sample code, developers can observe real-time waveform changes through serial plotter or visualization tools.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Test observations:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ambient noise produces irregular waveform patterns<\/li>\n\n\n\n<li>Blowing air toward the microphone causes significant waveform amplitude changes<\/li>\n\n\n\n<li>When no sound is present, the waveform remains stable<\/li>\n\n\n\n<li>Waveform transitions are clearly visible during repeated sound input tests<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"400\" height=\"254\" src=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-11.png\" alt=\"\" class=\"wp-image-15874\" style=\"width:491px;height:auto\" srcset=\"https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-11.png 400w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-11-300x191.png 300w, https:\/\/sistc.com\/wp-content\/uploads\/2025\/11\/image-11-18x12.png 18w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">These results demonstrate that the module performs reliably for downstream applications including FFT analysis, ASR, and AI acoustic modeling.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>7. Conclusion<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <a href=\"https:\/\/sistc.com\/\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">SISTC<\/mark><\/a> Electronic Building Block MEMS I2S Microphone Module (Developer Edition) provides:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Easy wiring &amp; setup<\/li>\n\n\n\n<li>High sensitivity &amp; low noise<\/li>\n\n\n\n<li>Standard I2S digital output<\/li>\n\n\n\n<li>Excellent compatibility with ESP32 and Arduino<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This makes it an ideal platform for beginners, educators, audio developers, and AI researchers.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Applicable scenarios:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Speech recognition<\/li>\n\n\n\n<li>AI learning &amp; audio classification<\/li>\n\n\n\n<li>Acoustic data collection<\/li>\n\n\n\n<li>STEM \/ maker education<\/li>\n\n\n\n<li>Smart device prototyping<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>As voice interaction, acoustic analysis, and AI-enabled applications continue to grow, high-performance and easy-to-use microphone modules have become essential tools for developers, educators, and makers.The SISTC Electronic Building Block MEMS [&hellip;]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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