When were baby monitors invented

The Evolution of Baby Monitors: From Audio to High-Tech Solutions

Baby monitors are devices that allow parents or caregivers to remotely listen to or watch their babies while they are in another room or location. They are designed to provide peace of mind, safety, and convenience for both the baby and the parent. But how did baby monitors come to be and how have they changed over the years? In this article, I will explore the history and evolution of baby monitors, from their humble beginnings to their modern innovations.

The First Baby Monitor: The Zenith Radio Nurse

The first baby monitor was invented in 1937 by Eugene F. McDonald, the president of Zenith Radio Corporation, a leading manufacturer of radios and televisions. He was inspired by a tragic event that occurred in 1932, when the 20-month-old son of Charles Lindbergh, a famous aviator, was kidnapped from his home and later found dead. McDonald wanted to prevent such a tragedy from happening to his daughter, so he devised a device that could transmit sounds from her room to his office.

The device was called the Zenith Radio Nurse and it consisted of two units: a transmitter with a microphone that was placed near the baby’s crib, and a receiver with a speaker that was carried by the parent. The device used radio waves to transmit the sounds and relied on an electrical circuit to power it. The design of the device was done by Isamu Noguchi, a renowned Japanese-American sculptor and product designer.

The Zenith Radio Nurse was marketed as “the first practical radio nurse ever placed on the market” and sold for $19.95 (about $370 today). It was advertised as a way to “keep constant watch over your baby without disturbing him” and “to guard against prowlers, fire, and other dangers”. However, the device had some limitations and drawbacks. It only provided one-way communication, meaning that the parent could not talk back to the baby. It also had poor sound quality and was prone to interference from other radio signals or electrical appliances. Moreover, it required a constant power source and could not be used outdoors or in remote areas.

The Evolution of Baby Monitors: 1937 to 1970

The first designed baby monitor, Zenith Radio had a one-way intercom and relied on an electrical circuit to transmit its analog audio signals². It was not until the 1950s that battery-powered baby monitors became available, allowing more portability and flexibility for parents. However, these devices still used analog signals and had low sound quality and high interference.

In the 1960s and 1970s, baby monitors started to incorporate more features and functions, such as volume control, light indicators, temperature sensors, and music players. Some models also offered two-way communication, allowing parents to talk or sing to their babies through the device. However, these devices still used analog signals and had limited range and reliability.

The Modern Baby Monitors: 1980s to Present

The major development in the modern baby monitor came in the 1980s with the introduction of digital technology. Digital baby monitors used digital signals instead of analog signals, which improved the sound quality, reduced the interference, and increased the security of the communication. Digital baby monitors also used wireless technology, such as radio frequency (RF), infrared (IR), or Wi-Fi, which expanded the range and mobility of the devices.

In the 1990s and 2000s, baby monitors evolved further with the addition of video cameras and LCD screens, allowing parents to see as well as hear their babies. These devices were often called baby cams or video baby monitors. Some models also used night vision technology or motion detection technology to enhance the visibility and functionality of the devices.

In recent years, baby monitors have become more advanced and sophisticated with the integration of smart features and innovations. Some examples are:

  • Internet-enabled baby monitors: These devices use Wi-Fi or cellular networks to connect to the internet and allow parents to access their babies’ audio and video feeds through their smartphones, tablets, or computers. They also allow parents to share their feeds with other authorized users, such as family members or babysitters.
  • Cloud-based baby monitors: These devices use cloud computing services to store and process their audio and video data online instead of locally on their devices. This allows parents to access their feeds from anywhere and anytime, as well as to save or review their recordings later.
  • Artificial intelligence (AI) baby monitors: These devices use AI algorithms to analyze their audio and video data and provide insights and alerts to parents. For example, they can detect the baby’s mood, sleep patterns, breathing rate, or cry patterns and notify the parents accordingly. They can also offer suggestions or tips to improve the baby’s well-being or development.


Baby monitors are devices that have been around for almost a century and have undergone significant changes and improvements over the years. They have evolved from simple audio devices to high-tech solutions that offer audio, video, internet, cloud, and AI capabilities. They have also become more affordable, accessible, and user-friendly for parents and caregivers. Baby monitors are devices that can provide peace of mind, safety, and convenience for both the baby and the parent. However, they are not without their challenges and risks, such as privacy, security, reliability, or accuracy issues. Therefore, parents should always be careful and responsible when using baby monitors and consult their pediatricians or experts before making any decisions..

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