AC and DC are terms referring to power sources. Piezo refers to materials that produce an electrical current when disturbed by vibrations. In that respect, all sound reproductions are alternating but are not considered power sources. The most common of the piezo crystals are the fire-starters that create a spark when a trigger is pulled. The pickups shown in this question are discs that are glued or clamped onto soundboards or bridges of guitars to produce an acoustic guitar or drum amplification.

Was wondering if these would be ok to be used on the underside of tap shoes between the tap and the shoe to pick up the sound?

It will pick up the the sound of almost anything but it has to be connected to an amplifier. Not sure how you would do that with shoes unless maybe using a wireless jack connection.

how do you mount them?

I use double-sided tape. Use the thinnest tape you can find to minimize any cushioning effect that would degrade the response.

do these generate electricity by pressure and mechanical stress?

I believe we need more information on the question. Either pressure applied to the sensor, either sound or mechanical causes internal stress on the piezo material inside creating the electrical output. If you are asking about external force being applied, it can be either air pressure or mechanical. The output voltage is a response level to the force applied, so the sound or air pressure response will be at much lower output level that if you physically impact the sensor. I hope this helps

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TIMESETL 15pcs Piezo Pickup 27mm Piezo Amplifiers Discs with 13" Leads for Acoustic Guitar Drum

TIMESETL 15pcs Piezo Pickup 27mm Piezo Amplifiers Discs with 13" Leads for Acoustic Guitar Drum

Product ID: 388011343

Details

Brand
TIMESETL
Colour
Brass
Item dimensions L x W x H
18 x 5 x 1.5
Material
Alloy Steel
Model name
TIMESETL

⚡4.6 KHz resonant frequency

🎸27mm diameter piezo disc

🔌13" pre-wired leads

¥4835

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Description

🎶 Elevate your sound game—capture every vibe with TIMESETL Piezo Pickups!

DURABLE RELIABLE - Temperature-resistant brass and ceramic build guarantees long-lasting performance in any environment.
PRO LEVEL SENSITIVITY - Resonant frequency at 4.6 KHz with low impedance ensures high-fidelity sound with minimal power draw.
PLUG PLAY CONVENIENCE - Pre-wired 13" leads make installation effortless—perfect for quick upgrades or DIY projects.
PRECISION SOUND CAPTURE - 27mm brass-ceramic disc delivers crystal-clear acoustic vibrations for authentic tone.
VERSATILE CREATIVE TOOL - Ideal for acoustic guitars, electronic drum triggers, contact mics, and innovative sound experiments.

The TIMESETL 15pcs Piezo Pickup set features 27mm brass-ceramic discs with a resonant frequency of 4.6 ± 0.5 KHz and 13" pre-wired leads, designed for easy installation on acoustic guitars and DIY instruments. Engineered for high sensitivity and durability, these pickups offer professional-grade sound capture and versatile applications from musical instruments to electronic devices.

Specifications

ASIN	B077YJ3H6R
Body Material	Brass
Brand Name	TIMESETL
Color	Brass
Connector Type	1/4" jack
Customer Reviews	4.6 4.6 out of 5 stars (384)
Included Components	15 x Piezo Disc
Item Dimensions	18 x 5 x 1.5 centimeters
Item Weight	40 Grams
Manufacturer	TIMESETL
Material	Alloy Steel
Model Name	TIMESETL
Model Number	TXJ-055-US
Part Number	TXJ-055-US
UPC	611702525250

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TrustScore 4.5 | 7,300+ reviews

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Great experience from order to delivery. Highly recommended!

1 week ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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¥4835

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

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TrustScore 4.5 | 7,300+ reviews

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Customer service was outstanding when I had questions about the product.

2 days ago

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Good experience, but the tracking updates could be better.

2 months ago

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