@drelizabetholds.bsky.social #perceptionscavengerhunt

The clips show how my cat reacts to different sounds. The birds and mouse noises have a positive association therefore my cat had a more curious body language. While the vacuum and dog barking are negatively associated and frightened her.

#PerceptionScavengerHunt @drelizabetholds.bsky.social

In this video, my younger sister and my mom showcase speech perception in action! As they sing together, their voices blend, yet each phoneme remains distinct, demonstrating perceptual constancy.

@drelizabetholds.bsky.social #PerceptionScavengerHunt
Water in a glass cup sounds clear, while a metal cup adds a sharp ring. Material density and resonance affect pitch and tone. Glass transmits sound smoothly, while metal vibrates more. Our ears pick up these differences to identify the material.

#PerceptionScavengerHunt @drelizabetholds.bsky.social
Softer surfaces like carpets absorb more energy, creating a duller sound. Harder surfaces produce higher-pitched, crisp bounces, while softer ones dampen the sound. Our ears perceive these differences in pitch, volume, and resonance.

For Round 4 of the scavenger hunt, I wanted to compare direct/indirect sound in different spaces. It’s very interesting to hear the difference in sound from an open location to an enclosed one. #PerceptionScavengerHunt
@drelizabetholds.bsky.social

This is a photo I took a while ago with a dolphin, who are a prime example of using rarefaction and compression in the water to communicate with each other (echolocation). They rely heavily on sound perception, and are also incredibly cute:) @drelizabetholds.bsky.social #PerceptionScavengerHunt

#PerceptionScavengerHunt @drelizabetholds.bsky.social
Indoors, sound reaches us both directly and after bouncing off surfaces, creating echoes and reverb. Outdoors, most sound arrives directly. These differences change how we perceive loudness, distance, and location of sound sources.

#PerceptionScavengerHunt
@drelizabetholds.bsky.social
You are able to identify which direction the sound is coming from and how far away the sound is being made as it travels through the room.

Speech Segmentation!The individual mentally segments the independent letters, after repeating it, they realize the blended word they formed. Our prior knowledge of the meaning of sounds helps separate words from a continuous speech stream. #PerceptionScavengerHunt @drelizabetholds.bsky.social

@drelizabetholds.bsky.social #PerceptionScavengerHunt || Notice how when my brother changes only one note, our perception of the sound goes from happy to sad! The frequency lowers, making the note sound more mellow and sad to our human ears.

@drelizabetholds.bsky.social #perceptionscavengerhunt
How spaces shape sound: Rooms reflect or absorb sound differently. Our brain suppresses echoes, but reversing audio disrupts this, making them more obvious, and highlighting how environments shape our perception of sound.

#PerceptionScavengerHunt @DrElizabethOlds.bsky.social
This video shows how different containers (glass, plastic & ceramic) combined with different viscosities of liquid (water&.1:1 water honey ratio) can have differing effects on wavelengths of sound and the echo and sound that they produce. :)

Speech Reading is demonstrated here because my friend had noise cancelling headphone in her ears and she was visually observing my lips to figure out what I was saying! @drelizabetholds.bsky.social #PerceptionScavengerHunt

@drelizabetholds.bsky.social
#perceptionscavengerhunt
This video demonstrates the concept of amplitude. At a low volume the water does not have much movement, when the volume is turned up high the ripples are far greater.

@drelizabetholds.bsky.social #PerceptionScavengerHunt
This photo I found shows me yelling at the camera. This shows sound perception. Infer that I am demonstrating high levels of amplitude and loudness. Further, predict that my voice would be using a simple tone (repeating, regular pattern).

Even with vocals and instruments overlapping, our brains separate the sound into distinct streams! 🎶 This is an example of perceptual grouping! Initially I was following the bass guitar, and then I was able to focus on the vocals! #perceptionscavengerhunt @drelizabetholds.bsky.social

You probably heard peel the first time — but I never actually said it. That’s the Phoneme Restoration Illusion: your brain fills in missing speech sounds based on context.

#PerceptionScavengerHunt @drelizabetholds.bsky.social

Even without sound, this ocean image can make us ‘hear’ waves in our minds. It shows how our brain connects visual cues with stored auditory memories.
@drelizabetholds.bsky.social #Perceptionscavengerhunt

#PerceptionScavengerHunt @drelizabetholds.bsky.social
In this video, you can hear how the taller plastic bottle creates more of an echo when water is poured due to sound waves bouncing off inside the bottle for longer. The shorter cup limits the resonance duration compared to the taller one.

@drelizabetholds.bsky.social

#PerceptionScavengerHunt

In this video, I show how our brain uses perceptual reorganization to find meaning in jumbled speech. When we hear someone talk quickly, the words can blur together, but our brain naturally separates them using patterns and context.

Here is a short video showing different sounds frequnceys, loud and soft sounds #PerceptionScavengerHunt @drelizabetholds.bsky.social

Here's a short video capturing the distinctive sound of a crosswalk signal. These signals are designed with a frequency and amplitude to be highly noticeable in a busy urban environment, serving as crucial #AuditorySignals for pedestrian safety. @drelizabetholds.bsky.social #PerceptionScavengerHunt

Perception Auditory Ambiguity #PerceptionScavengerHunt @drelizabetholds.bsky.social

@drelizabetholds.bsky.social #PerceptionScavengerHunt
This video showcases the difference in frequencies perceived in a human vesus my pup Binoo, where a human only can perceive in the 20 Hz to 20 kHz (age depending), while dogs can hear from 40 hZ to 60 kHz.

The audio wouldn't load on mobile or desktop so I emailed it to you @drelizabetholds.bsky.social This specific soundwave/frequency is easier to hear underwater as water is denser than air, causing sound waves to travel faster and with less energy loss, amplifying them. #PerceptionScavengerHunt

Sometimes when talking we misinterpret something that someone said, showing the phonemic restoration effect. This is why top-down processing and context is important or else we may fill in the wrong phoneme resulting in the incorrect response.
#PerceptionScavengerHunt @drelizabetholds.bsky.social

The bouncing ball’s changing pitch and volume capture motion through sound, showing how we perceive energy loss and distance with our hearing.

#perceptionscavengerhunt
@drelizabetholds.bsky.social

Testing Auditory localization and different frequencies on my dog!
As I was hiding behind my kitchen counter, I made different sounds to see if he could locate me. this showcases his ability to find my location simply off of sound.
#PerceptionScavengerHunt
@drelizabetholds.bsky.social

@drelizabetholds.bsky.social #PerceptionScavengerHunt

This video demonstrates top-down processing and cognitive priming. When only the sound is heard it is difficult to comprehend what is happening. However, when the lighter is visible it becomes apparent that the sound is produced by the lighter.

@drelizabetholds.bsky.social #PerceptionScavengerHunt

In this video the word that I am sayin appears to be 'FAR', but when you close your eyes you can better hear the original word that I am saying 'BAR'. This displays the McGurk Effect where visual info can affect speech perception