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Audio Line Noise Suppression for Smartphones

Murata examines how to maintain audio quality while suppressing noise in the internal audio circuits of smartphones. Smartphone audio quality differs by manufacturer as illustrated by the Earphone Audio Distortion Diagram (below), which shows the results of measuring audio distortion (THD + N). Common ferrite beads were used for noise suppression in the internal audio circuits of smartphones with poor THD + N results, but the models that emphasized audio quality used Murata's NFZ series. As the shift toward high-resolution audio continues to advance not only in specialized audio equipment but also in smartphones, audio filters that consider the impact on audio quality will become increasingly important.

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Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (PEN) Filter the results in the table by unit price based on your quantity.	Qty.
RF Inductors - SMD LQW15CAR64K00D Murata Electronics 1: S/1.75 19,880In Stock	Mfr. Part # LQW15CAR64K00D Mouser Part # 81-LQW15CAR64K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	19,880In Stock	Cut Tape S/1.75 S/1.45 S/1.39 S/1.13 View Reel S/0.763 S/1.10 S/0.95 S/0.845 S/0.763 S/0.763 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 180 NH 5% LQW15CAR18J00D Murata Electronics 1: S/1.60 8,009In Stock	Mfr. Part # LQW15CAR18J00D Mouser Part # 81-LQW15CAR18J00D	Murata Electronics	RF Inductors - SMD 180 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	8,009In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.767 S/0.845 S/0.767 S/0.767 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 270 NH 5% LQW15CAR27J00D Murata Electronics 1: S/1.60 8,900In Stock	Mfr. Part # LQW15CAR27J00D Mouser Part # 81-LQW15CAR27J00D	Murata Electronics	RF Inductors - SMD 270 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	8,900In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.755 S/0.845 S/0.755 S/0.755 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 390 NH 5% LQW15CAR39J00D Murata Electronics 1: S/1.60 8,880In Stock	Mfr. Part # LQW15CAR39J00D Mouser Part # 81-LQW15CAR39J00D	Murata Electronics	RF Inductors - SMD 390 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	8,880In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.751 S/0.845 S/0.751 S/0.751 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
Ferrite Beads NFZ15SG262SN10D Murata Electronics 1: S/0.817 10,646In Stock	Mfr. Part # NFZ15SG262SN10D Mouser Part # 81-NFZ15SG262SN10D	Murata Electronics	Ferrite Beads Learn More about Murata Electronics murata nfz chip noise filters	Datasheet	10,646In Stock	Cut Tape S/0.817 S/0.568 S/0.494 S/0.444 View Reel S/0.269 S/0.397 S/0.339 S/0.30 S/0.28 S/0.269 S/0.269 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CA22NK00D Murata Electronics 1: S/1.60 5,344In Stock	Mfr. Part # LQW15CA22NK00D Mouser Part # 81-LQW15CA22NK00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	5,344In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.775 S/0.845 S/0.775 S/0.775 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR32K00D Murata Electronics 1: S/1.60 4,394In Stock	Mfr. Part # LQW15CAR32K00D Mouser Part # 81-LQW15CAR32K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	4,394In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.802 S/0.845 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
Ferrite Beads NFZ18SM501SZ10D Murata Electronics 1: S/1.67 8,065In Stock	Mfr. Part # NFZ18SM501SZ10D Mouser Part # 81-NFZ18SM501SZ10D	Murata Electronics	Ferrite Beads Learn More about Murata Electronics murata nfz chip noise filters	Datasheet	8,065In Stock	Cut Tape S/1.67 S/1.18 S/1.02 S/0.915 View Reel S/0.424 S/0.814 S/0.697 S/0.615 S/0.537 S/0.424 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
Ferrite Beads NFZ18SM251SZ10D Murata Electronics 1: S/1.67 1,249In Stock	Mfr. Part # NFZ18SM251SZ10D Mouser Part # 81-NFZ18SM251SZ10D	Murata Electronics	Ferrite Beads Learn More about Murata Electronics murata nfz chip noise filters	Datasheet	1,249In Stock	Cut Tape S/1.67 S/1.18 S/1.02 S/0.915 View Reel S/0.424 S/0.814 S/0.697 S/0.615 S/0.537 S/0.424 MouseReel Available	Min.: 1 Mult.: 1 : 4,000
RF Inductors - SMD LQW15CA83NJ00D Murata Electronics 1: S/1.87 2,595In Stock	Mfr. Part # LQW15CA83NJ00D Mouser Part # 81-LQW15CA83NJ00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	2,595In Stock	Cut Tape S/1.87 S/1.58 S/1.45 S/1.18 View Reel S/0.802 S/1.11 S/0.911 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR11K00D Murata Electronics 1: S/1.71 9,990In Stock	Mfr. Part # LQW15CAR11K00D Mouser Part # 81-LQW15CAR11K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	9,990In Stock	Cut Tape S/1.71 S/1.40 S/1.15 S/1.11 View Reel S/0.786 S/0.95 S/0.845 S/0.786 S/0.786 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR43K00D Murata Electronics 1: S/1.60 3,932In Stock	Mfr. Part # LQW15CAR43K00D Mouser Part # 81-LQW15CAR43K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	3,932In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.802 S/0.845 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CA22NJ00D Murata Electronics 1: S/1.83 17,841In Stock	Mfr. Part # LQW15CA22NJ00D Mouser Part # 81-LQW15CA22NJ00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	17,841In Stock	Cut Tape S/1.83 S/1.58 S/1.45 S/1.17 View Reel S/0.814 S/1.11 S/0.946 S/0.841 S/0.814 S/0.814 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 2 UH 10% LQW15CA2R0K00D Murata Electronics 1: S/1.60 11,691In Stock	Mfr. Part # LQW15CA2R0K00D Mouser Part # 81-LQW15CA2R0K00D	Murata Electronics	RF Inductors - SMD 2 UH 10% Learn More about Murata Electronics murata lqw inductors	Datasheet	11,691In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.981 View Reel S/0.802 S/0.868 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 110 NH 5% LQW15CAR11J00D Murata Electronics 1: S/1.60 12,321In Stock	Mfr. Part # LQW15CAR11J00D Mouser Part # 81-LQW15CAR11J00D	Murata Electronics	RF Inductors - SMD 110 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	12,321In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/1.01 View Reel S/0.802 S/0.868 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR14J00D Murata Electronics 1: S/1.60 7,504In Stock	Mfr. Part # LQW15CAR14J00D Mouser Part # 81-LQW15CAR14J00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	7,504In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.981 View Reel S/0.802 S/0.868 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR22J00D Murata Electronics 1: S/1.60 7,813In Stock	Mfr. Part # LQW15CAR22J00D Mouser Part # 81-LQW15CAR22J00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	7,813In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/1.01 View Reel S/0.802 S/0.868 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 Max.: 10,000 : 10,000
RF Inductors - SMD LQW15CAR56K00D Murata Electronics 1: S/1.71 8,773In Stock	Mfr. Part # LQW15CAR56K00D Mouser Part # 81-LQW15CAR56K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	8,773In Stock	Cut Tape S/1.71 S/1.40 S/1.18 S/0.965 S/0.864 Reel S/0.864 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 730 NH 5% LQW15CAR73J00D Murata Electronics 1: S/1.60 13,366In Stock	Mfr. Part # LQW15CAR73J00D Mouser Part # 81-LQW15CAR73J00D	Murata Electronics	RF Inductors - SMD 730 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	13,366In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.743 S/0.845 S/0.743 S/0.743 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD Fixed IND 390nH 320mA NONAUTO LQW15CAR39K00D Murata Electronics 1: S/1.71 10,709In Stock	Mfr. Part # LQW15CAR39K00D Mouser Part # 81-LQW15CAR39K00D	Murata Electronics	RF Inductors - SMD Fixed IND 390nH 320mA NONAUTO Learn More about Murata Electronics murata lqw inductors	Datasheet	10,709In Stock	Cut Tape S/1.71 S/1.40 S/1.15 S/1.13 View Reel S/0.864 S/0.981 S/0.872 S/0.864 S/0.864 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 500 NH 5% LQW15CAR50J00D Murata Electronics 1: S/1.60 12,685In Stock	Mfr. Part # LQW15CAR50J00D Mouser Part # 81-LQW15CAR50J00D	Murata Electronics	RF Inductors - SMD 500 NH 5% Learn More about Murata Electronics murata lqw inductors	Datasheet	12,685In Stock	Cut Tape S/1.60 S/1.32 S/1.09 S/0.95 View Reel S/0.802 S/0.845 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD 1000 NH 10% LQW15CA1R0K00D Murata Electronics 1: S/1.60 3,942In Stock 10,000Expected 10/15/2026	Mfr. Part # LQW15CA1R0K00D Mouser Part # 81-LQW15CA1R0K00D	Murata Electronics	RF Inductors - SMD 1000 NH 10% Learn More about Murata Electronics murata lqw inductors	Datasheet	3,942In Stock 10,000Expected 10/15/2026	Cut Tape S/1.60 S/1.32 S/1.09 S/1.01 View Reel S/0.775 S/0.868 S/0.775 S/0.775 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CA39NJ00D Murata Electronics 1: S/1.71 3,226In Stock	Mfr. Part # LQW15CA39NJ00D Mouser Part # 81-LQW15CA39NJ00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	3,226In Stock	Cut Tape S/1.71 S/1.40 S/1.15 S/1.13 View Reel S/0.864 S/0.981 S/0.872 S/0.864 S/0.864 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CA59NK00D Murata Electronics 1: S/1.83 3,615In Stock	Mfr. Part # LQW15CA59NK00D Mouser Part # 81-LQW15CA59NK00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	3,615In Stock	Cut Tape S/1.83 S/1.58 S/1.45 S/1.17 View Reel S/0.814 S/1.11 S/0.946 S/0.841 S/0.814 S/0.814 MouseReel Available	Min.: 1 Mult.: 1 : 10,000
RF Inductors - SMD LQW15CAR22K00D Murata Electronics 1: S/1.87 936In Stock 10,000Expected 12/1/2026	Mfr. Part # LQW15CAR22K00D Mouser Part # 81-LQW15CAR22K00D	Murata Electronics	RF Inductors - SMD Learn More about Murata Electronics murata lqw inductors	Datasheet	936In Stock 10,000Expected 12/1/2026	Cut Tape S/1.87 S/1.58 S/1.45 S/1.18 View Reel S/0.802 S/1.11 S/0.911 S/0.868 S/0.802 S/0.802 MouseReel Available	Min.: 1 Mult.: 1 : 10,000

Audio Line Noise Suppression for Smartphones

Types of Passive Components

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