Built-in Audio on a Rechargeable LCD Greeting Card: Speaker Quality and Sound Volume Explained

The built-in audio speaker on a rechargeable LCD greeting card is just as important as the screen. A beautiful video with muffled or barely audible sound ruins the entire experience. At Rophone, every rechargeable LCD greeting card we manufacture comes with a high-quality built-in speaker that delivers clear, loud audio. In this article, we explain how the audio system on a rechargeable LCD greeting card works and what you need to know about sound quality and volume.

1. How the Speaker on a Rechargeable LCD Greeting Card Works

Every rechargeable LCD greeting card has a tiny but powerful speaker mounted inside the card body. When the rechargeable LCD greeting card is opened, a sensor triggers both the LCD screen and the speaker simultaneously. The audio is embedded in the MP4 video file, so the sound plays in perfect sync with the video. There are no separate audio cables or controls. The speaker on a rechargeable LCD greeting card is a small magnetic piezo or dynamic speaker, typically 15mm to 28mm in diameter depending on card size.

The audio system on our rechargeable LCD greeting card delivers 80 to 90 decibels of volume, which is loud enough for most indoor environments including offices, homes and retail displays. For louder environments like trade shows or outdoor events, Rophone offers an upgraded larger speaker option for your rechargeable LCD greeting card that pushes 95+ decibels.

2. Speaker Sizes for Different Rechargeable LCD Greeting Card Models

The speaker size on a rechargeable LCD greeting card depends on the screen size. A 2.4 inch rechargeable LCD greeting card uses a 15mm speaker and delivers 80dB. A 4.3 inch rechargeable LCD greeting card uses a 20mm speaker and delivers 85dB. A 7 inch rechargeable LCD greeting card uses a 28mm speaker and delivers 90dB. A 10 inch rechargeable LCD greeting card uses a 36mm speaker and delivers 95dB. The larger the speaker on your rechargeable LCD greeting card, the fuller and richer the audio sounds.

Rophone tests every speaker on every rechargeable LCD greeting card during our 72-hour QC burn-in. We play a 1kHz test tone through each card and measure the decibel output with a sound meter. Any rechargeable LCD greeting card that falls below the rated volume is pulled from the line and the speaker is replaced. This ensures that every rechargeable LCD greeting card we ship meets our audio quality standards.

3. Audio File Formats and Custom Sound for Your Rechargeable LCD Greeting Card

The rechargeable LCD greeting card supports MP4 video with embedded AAC audio. This is the most widely compatible audio format and works perfectly with our playback chips. You can record your own voiceover, music or sound effects and embed them directly into your video. If you need a specific audio mix for your rechargeable LCD greeting card, Rophone can help with video editing and audio mastering at no extra cost for orders over 500 pieces.

Many brands use the audio on their rechargeable LCD greeting card creatively. Wedding invitations use a recorded voice message from the couple. Corporate greeting cards use a branded jingle. Product launch cards use a narrator explaining the product. The possibilities are endless. Our team will help you choose the right audio approach for your rechargeable lcd greeting card project based on your brand and audience.

4. Volume Control and Auto-Shutoff on Rechargeable LCD Greeting Card

Every rechargeable LCD greeting card has a built-in volume control resistor that sets the maximum volume. The volume is factory-set based on your requirements. If you need a quieter rechargeable LCD greeting card for a museum or library setting, we can lower the volume to 60dB. If you need a loud rechargeable LCD greeting card for a trade show booth, we can boost it to 95dB. There are no external volume buttons on the card, which keeps the design clean and premium.

The rechargeable LCD greeting card also has an auto-shutoff feature. If the card stays open for more than 5 minutes without being touched, the screen and speaker turn off automatically to save battery. When you close and reopen the rechargeable LCD greeting card, it resumes playback from the beginning. This feature extends battery life significantly. Browse our full electronic greeting card range to see all audio options.

5. Why Rophone Audio Quality Is the Best in the Industry

Rophone sources only A-grade speakers from certified manufacturers. We do not use cheap generic speakers that distort at high volumes. Every speaker on a rechargeable LCD greeting card is tested for frequency response, distortion and maximum SPL before assembly. Our QC team also listens to a random sample from every batch to verify that the audio sounds natural and clear. This attention to audio detail is why brands like HSBC, Versa HD and World Robot Olympiad trust Rophone for their rechargeable LCD greeting card orders.

If you would like to test the audio quality yourself, contact Rophone for a free sample. We will ship you a sample custom rechargeable LCD greeting card so you can hear the speaker quality firsthand. We handle design, video editing, audio mastering, production and worldwide shipping for every order.