Sennheiser Momentum Sport earbuds bring heart rate and body temp sensors to your workout

There are earbuds aplenty at CES 2024 and today Sennheiser revealed its two latest models in Las Vegas. The company has updated its flagship Momentum line with a new premium model, the Momentum True Wireless 4, while also debuting its first tech-filled set of fitness earbuds in the Momentum Sport. Both sit at the top end of the company's lineup and will cost you $300 or more when they arrive later this year.

Sennheiser says it took over three years of work to build the Momentum Sport, combining fitness tech with its trademark sound quality. Inside, a photoplethysmography (PPG) heart rate sensor and a body temperature sensor can send workout biometrics to apps like Apple Health, Garmin Connect, Strava, Peloton and Polar Flow. The earbuds only send body temp info to that last app though. Sennheiser says the Momentum Sport marks the first time ever that a non-Polar product will be able to leverage the data analytics of Flow for real-time analytics. What's more, the Momentum Sport's stats work with the Polar Vantage V3 watch and you can have training audio (Smart Coaching) sent from the company's app to the earbuds.

The company did a live demo of the Momentum Sport earbuds with the Vantage V3 watch and the Polar app. Someone rode a Peloton and sent live biometrics to the app in real time. The integration is seamless, as you would expect across a smartwatch and app from a company worked closely with to develop these wireless earbuds. The team-up means Sennheiser didn't have to develop its own fitness app to make the most of the Momentum Sport's sensors.

Sennheiser explains that it created an all-new 10mm transducer for the Momentum Sport, aiming for the type of "vivid sound and impressive bass" most people desire for workouts. The company also included an acoustic relief channel that relieves the occlusion effect or feeling that your ears are plugged and stressed with pressure. Sennheiser says that design element also reduces breathing noise, footstep thunder and other body noises that could be distracting during a session.

The Momentum Sport has a semi-open design that lets a bit of your surroundings in naturally, but you can also opt for transparency mode to stay fully in tune. There's also active noise cancellation (ANC) when you need to focus and an anti-wind mode to combat the breeze when you're outdoors. Sennheiser manages an IP55 rating for the earbuds to withstand moisture and dust, while also using a shock-proof construction and clog resistant eartips so any wax buildup won't be a problem. The charging case is IP54 rated itself and offers wireless charging.

Sennheiser promises up to six hours of battery life on the Momentum Sport, but doesn't specify if that's with ANC on or off. There are three additional charges in the case and 10 minutes of charging can give you 45 minutes of use. Of course, these earbuds also work with the company's Smart Control app for tweaking the sound profile and a variety of settings and there's a collection of ear tips and fins to find the ideal fit.

The Momentum Sport will be available on April 9 for $330 (€330) in black, green and graphite color options.

The Momentum True Wireless 4 is the follow up to the company's Momentum 3 earbuds that debuted in 2022. Sennheiser says it added over a dozen upgrades to this model, including Qualcomm's S5 Sound Gen 2 platform with ​Snapdragon Sound in addition to support for Bluetooth 5.4, aptX Lossless, aptX Adaptive Audio, LE Audio, LC3, Auracast and more. A six-microphone setup improves call quality and ANC performance, according to the company, while an adaptive EQ monitors sound input consistent audio across both musical styles and content types. Sound Personalization, Sound Zone and Sound Check features are available here once again through the Smart Control app.

Sennheiser says it updated the design of the ear tip and nozzle to better protect against ear wax. It also includes a "comprehensive" fit kit that offers a smattering of ear tips and fins, along with a fit test in its app, to ensure that you're not sacrificing performance with the wrong components. In terms of the sound quality, the company promises "evolved tuning," with "smoother treble response, extensive bass and effortless midrange." Sennheiser has consistently built some of the best wireless earbuds in terms of overall sound for years, so we have every reason to believe these claims.

The Momentum True Wireless 4 offers up to seven and a half hours of battery life on the buds (ANC not specified) with another three full charges in the wireless charging case. What's more, the company explains that it upgraded battery performance over time with a battery protection mode that optimizes charging cycles.

The Momentum True Wireless 4 will be available to preorder in black copper, metallic silver and graphite on February 15 for $300 (€300), $50 more then the previous model cost at launch. The earbuds will begin shipping on March 1.

Update, January 10 2024, 10:59AM ET: We've since gotten hands-on with the Momentum 4 and Momentum 4 Sport. Read our first impressions here.

We're reporting live from CES 2024 in Las Vegas from January 6-12. Keep up with all the latest news from the show here.