31/12/2025
Three hours left before the year 2026!
New Year celebrations are known to be loud, colorful, and full of joy as a way to greet the incoming year. The sights of mesmerizing firework displays, the sounds of blaring car horns, coins shaking inside our pockets, children jumping in hopes of growing taller - all of these make up the Filipino ‘Bagong Taon’ experience. Among the noisemaking methods we are very familiar with is the use of party horns or toy trumpets, locally known as “torotot,” to make the holidays livelier. Learn how simple gusts of air turn into loud and festive sounds in this year’s last Wisdom Wednesday!
The use of ‘torotots’ is a symbolic element in Filipino New Year’s Eve traditions. It is linked to beliefs regarding fortune as Filipinos believe that making a lot of noise at midnight would help ward off evil spirits and bad luck, and invite good luck and prosperity to ensure a peaceful start to the incoming year. Aside from this fact, the ‘torotot’ is also highly valued as a safer and more sustainable alternative to firecrackers and pyrotechnic devices. The use of safe substitutes like light sticks, torotots, drums, or even pots and pans is promoted by the Department of Health (DOH) as part of their “Iwas Pap**ok” campaign, which aims to encourage a peaceful and injury-free celebration.
So how does the ‘torotot’ work?
The loud sound it produces is a result of vibrations coming from the membrane inside it. Sound is a type of energy produced when objects vibrate. Blowing air into the membrane makes it vibrate, which then propagates to nearby air molecules to produce sound waves. The vibrations then travel out of the “bell” or the air outlet typically shaped like a cone. The same mechanism is also used in airhorns, which uses a pneumatic pump to compress air towards the membrane.
The resonant frequency and pitch (highness and lowness) of the sound produced is determined by the membrane’s properties. The thickness determines the pitch as it determines the inertia or how much resistance to vibration the membrane has. Thicker membranes have more inertia which produces sound with lower frequencies and longer wavelengths - a lower pitch! Whereas thinner, lighter, and tightly stretched materials will produce a higher pitched sound. Materials used to make the torotots’ membranes are mostly thin films that have small surface density, making them suitable noisemakers. This characteristic allows the material to vibrate easily in response to air pressure or sound waves, which is critical for the horn’s ability to produce sound efficiently. The bell also helps amplify the sound produced by directing the sound waves into a unified direction. Most ‘torotots’ are cone-shaped and have a flare at the end for a reason - increasing the cross-sectional area through which the vibrations travel means that more and more air molecules vibrate - producing a louder sound!
While the ‘torotot’ is traditionally made of simple materials such as plastic and bamboo, studies highlight uses of Polyvinyl Chloride (PVC) film and more sustainable material designs. PVC film is commonly used commercially, often in lightweight polymer film materials like bubble wrap. However, this material is often discarded after use, leading to environmental pollution. In order to address environmental concerns, research tries to focus on the secondary use of discarded film bubble materials and other similar items, recognized to be beneficial to environment protection. Likewise, the use of paper and cardboard as materials for the bell of the ‘torotot’ serves as a biodegradable alternative to plastics as it is still a light material with similar properties needed to create high-frequency vibration and loud pitch production. The use of recycled materials adds to its purpose of being a more sustainable way of celebrating. It is able to fulfill its role in the Filipino New Year’s tradition of creating celebratory noise, while also welcoming prosperity with safety and simultaneously reducing environmental pollution caused by discarded wastes.
The UP Materials Science Society wishes everyone a safe, happy, and prosperous new year! See you all on the other side!
Content by: Keiara Soleil Jumaquio
Design by: Ezekiel Jaye Dayao and Anzelmei De Castro
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Wisdom Wednesday is brought to you by the UP Materials Science Society. Want more knowledge? Stay tuned next week for another amazing Wisdom Wednesday!