> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# Grove - Loudness Sensor (Seeed Studio)

**Type:** Product page · **SKU:** SS101020063 · **Brand:** [Seeed Studio](https://core-electronics.com.au/brands/seeed-studio-australia)
**Page:** https://core-electronics.com.au/grove-loudness-sensor-seeed-studio.html ([markdown](https://core-electronics.com.au/grove-loudness-sensor-seeed-studio.html.md))

The Grove - Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies...

## Pricing

- **Price:** $11.05 (inc GST) — $10.05 AUD, exc GST
- **Quantity discounts:** 25+ $9.37 (exc GST) · 50+ $8.79 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Sep 07 and Sep 09.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SS101020063:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SS101020063:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

The Grove - Loudness Sensor is designed to detect the loudness of environmental sound. Based on amplifier LM2904 and a built-in microphone, it amplifies and filters the high frequency signal that received from the microphone, and outputs a positive envelop. This will make for Arduino's signal acquisition. The output value depends on the level of sound input. In order to avoid unnecessary signal disturbances, input signal will go through two times filtering inside the module. Lastly, there is a screw potentiometer that enables manual adjustments to the output gain.

**Features**

- Grove compatible interface
- Wide supply voltage range
- Built-in signal filtering
- Gain adjustable via screw potentiometer
 
**Specifications**

 | Item | Min | Typical | Max | Unit |
|---|---|---|---|---|
| Voltage | 3.5 | 5.0 | 10 | VDC |
| Working Frequency | 50 | - | 20000 | HZ |
| Sensitivity | -48 | - | 66 | dB |
| Signal-to-noise Ratio | >58 | dB |
| Output Signal Range | Digital Signal(0-1023) | / |

For all Grove users (especially beginners), we provide you guidance PDF documents. Please download and read through [Preface - Getting Started](https://core-electronics.com.au/attachments/localcontent/Preface_164458957de.pdf) and [Introduction to Grove](https://core-electronics.com.au/attachments/localcontent/IntroductiontoGrove_50139924b1c.pdf) before your using of the product.

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/l/o/loudness_20sensor.jpg)