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

Product ID: 63573292

Details

Brand
TIMESETL
Color
Brass
Item dimensions L x W x H
7.09 x 1.97 x
Material
Brass Ceramic
Model Name
TXJ

⚡4.6 KHz resonant frequency

🎸27mm diameter piezo disc

🔌13" (33mm) long pre-wired leads

€ 16.65

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Description

🎶 Elevate your sound game with TIMESETL’s pro-grade piezo pickups—because your music deserves the spotlight.

PRO GRADE VALUE PACK - 15 discs included to experiment, replace, or upgrade multiple instruments—stay ahead of the curve with a ready-to-go sound toolkit.
DURABLE CRAFTSMANSHIP - Brass and ceramic construction ensures temperature resistance and long-lasting performance, built to withstand your busiest gigs and sessions.
PLUG PLAY VERSATILITY - Pre-wired 13" leads make installation effortless on guitars, drums, and DIY instruments—perfect for creative pros and tinkerers alike.
PRECISION ACOUSTIC CAPTURE - High-sensitivity piezo discs deliver crystal-clear sound with a resonant frequency of 4.6 KHz ±0.5 for authentic instrument tone.
MULTI INSTRUMENT COMPATIBILITY - Ideal for acoustic guitars, electronic drum triggers, contact mics, and even electronic toys—expand your sonic palette with one versatile kit.

The TIMESETL 15pcs Piezo Pickup set features 27mm diameter brass and ceramic discs with a resonant frequency of 4.6 KHz and 13" pre-wired leads, designed for high sensitivity and durability. Perfect for acoustic guitars, electronic drums, and DIY instruments, this versatile pack offers easy installation and reliable performance for musicians and creators seeking authentic sound capture.

Specifications

ASIN	B077YJ3H6R
Best Sellers Rank	#4,090 in Musical Instruments ( See Top 100 in Musical Instruments ) #4 in Guitar Pickups & Pickup Covers
Body Material	Brass
Brand Name	TIMESETL
Color	Brass
Connector Type	1/4" jack
Customer Reviews	4.5 4.5 out of 5 stars (421)
Included Components	15 x Piezo Disc
Item Dimensions	7.09 x 1.97 x 0.59 inches
Item Weight	40 g
Manufacturer	TIMESETL
Material	Brass, Ceramic
Model Name	TXJ
Model Number	TXJ-055-US
Number of Items	15
Part Number	TXJ-055-US
Set Name	15pcs Piezo Pickup Set
UPC	611702525250

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€ 16.65

Duties & taxes included

In stock

Sold byAmazon GreeceDelivered 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 Greece.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

Rajesh P.

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

2 days ago

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The MOLLE sheath is of exceptional quality. Very happy with my purchase.

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